Delay Attribution Board Floor 8 1 Eversholt Street London NW1 2DN

SUPPLEMENTARY INFORMATION

The content from this point is a supplement to The Guide It has been appended to the hard copy version of the DAG for ease of reference.

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Delay Attribution Board Floor 8 1 Eversholt Street London NW1 2DN

Delay Attribution Board Representatives

Franchised Passenger Class Band 1 DAB representative Govia Thameslink Railway Ltd Rebecca Holding Great Western Railway Northern Rail Ltd ScotRail Railway Ltd West Coast Trains Ltd Franchised Passenger Class Band 2 Abellio Greater Anglia Christopher W Johnson Arriva Trains Wales Ltd CrossCountry Trains Ltd London & South Eastern Railway Southern Railway Ltd Stagecoach South Western Trains Ltd Virgin East Coast Main Line Company Ltd Franchised Passenger Class Band 3 C2C Rail Ltd Lee Robinson East Midlands Trains Ltd First/Keolis Transpennine Ltd London Overground Rail Operations Ltd London & Birmingham Railway Ltd Merseyrail Electrics TfL Rail The Chiltern Railway Company Ltd Non-Franchised Passenger Class Eurostar Jonathan Seagar Grand Central Railway Hull Trains Company Ltd Nexus North Yorkshire Moors Railway The West Coast Company Non-Passenger Class companies - Band 1 DB Cargo Nigel Oatway Freightliner Ltd (Deputy Chairman) Non-Passenger Class companies - Band 2 COLAS Rail Ltd Neil Dodd Direct Rail Services GBRf Freightliner Heavy Haul Ltd Network Rail Alex Kenney Andrew Rowe Peter Craig John Thomlinson Carew Satchwell Mathew Courtliff Non-Voting Members Chairman: Richard Morris Secretary: Mark Southon PA to Secretary: Ana-Maria Sanchez

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TRAIN OPERATING COMPANY AND NETWORK RAIL BUSINESS CODES

Business Operating Company Business Operating Company Code Code Abellio Greater Anglia EB Grand Central Trains EC Abellio Scotrail HA Heathrow Connect EE Amey Infrastructure Services RE Heathrow Express HM Arriva Trains Wales HL Island Lines HZ Balfour Beatty Rail Plant RZ London Midland EJ c2c HT London Overground EK Caledonian Sleeper ES LUL Bakerloo Line XC Chiltern Railway HO LUL District Line – Wimbledon XB Colas Rail RG LUL District Line – Richmond XE Cross Country Trains EH Merseyrail HE DB Regio Tyne and Wear Metro PG Nexus (Tyne & Wear Metro) PG DB Schenker Rail WA North Yorkshire Moors Railway PR Devon and Cornwall Railway EN Northern Rail ED Direct Rail Services XH Rail Express Systems WA East Midlands Trains EM SB(Swietelsky Babcock)Rail RD Eurostar International GA Serco ES Europorte Channel PT South West Trains HY Great Western Railway EF Southeastern HU First Hull Trains PF TfL Rail (will become Crossrail) EX First Transpennine Express EA Virgin East Coast HB Freightliner Heavy Haul DB Virgin Trains HF Freightliner Intermodal DB West Coast Railway Co. PA GB Railfreight PE Volker Rail RH Govia Thameslink Railway ET

Network Rail – Route Business Codes Business Network Rail Route Network Rail Route Business Code Code Anglia QH South East Kent/Sussex QM/QB London North Eastern QG Wales QW London North Western QR Wessex QC Scotland QL Western QD 3 of 21

Delay Attribution Guide

September 2016

Briefing Document

For the attention of all staff who are involved in the Train Delay Attribution Process

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INTRODUCTION

This brief supplements, and covers the key changes made within the September 2016 DAG and also incorporates additional process and guidance documents developed by the DAB for improved understanding, application and consistency of the attribution process.

In terms of this September 2016 issue, as you will be accustom to, some of the changes are just cosmetic or corrective such as amending grammar or minor errors from the previous version. These are shown in the DAG in the normal red font / lined margins but won’t be covered in this brief.

Most importantly, the DAB have been reviewing (and will continue to review) the common areas of perceived misinterpretation of the DAG or areas that seem to cause the most ‘debate’ within the Industry – be it between Operators and Network Rail or indeed internally to the individual parties. Often, many of these ‘debates’ are just about understanding the principles (that, for many outside the attribution world, can admittedly seem perverse at times).

Therefore you will (hopefully) notice throughout this brief that many of the changes are about trying to drive that improved understanding. It is hoped that having some of the attribution principles set out in black and white, backed up by examples where appropriate, will go some way in reducing the amount of discussions that are occurring and drive more efficiency into the process.

The last two issues of the DAG were subject to re-ordering and renumbering which it is hoped has helped with general referencing and readability or the DAG. You will be pleased to know that this issue has no such changes.

Within this brief, the general briefing notes are in standard black and the DAG entries / references are in blue italics with some additional red font used to highlight key changes where only parts of the entry have changed.

As always, feedback on the DAG and these briefings is always welcome to ensure continual improvement with each issue.

Regards,

Mark Southon Board Secretary

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Part 1: Key changes within the September 2016 DAG

Delay Code Changes

Delay Codes Removed

No Delay Codes have been removed in this issue.

Delay Code Additions

No Delay Codes have been introduced in this issue.

Delay Code Alterations

Various Delay Codes have had their Description and Abbreviation amended to improve understanding and usage. Please refer to SECTION 5: DELAY CODES in the main brief.

SECTION 1: INTRODUCTION

There are no material changes to Section 1

SECTION 2: OVERVIEW OF DELAY ATTRIBUTION AND SYSTEM DEFINITIONS

There are no material changes to Section 2

SECTION 3: CATEGORIES OF TRUST DELAY CODE AND DEFAULT ATTRIBUTION

There are no material changes to Section 3

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SECTION 4: GUIDANCE ON RESPONSIBILITIES AND CODING OF DELAY INCIDENTS

Clarification to Section 4.2.4 Trains Incurring Several Small Delays

This section has been fully reviewed and updated to improve clarity and understanding of the application of certain elements relating to sub threshold attribution, particularly cumulative delay.

Paragraph 4.2.4.1 has been enhanced in order to clarify that this section relates to sub threshold delay where there is no prior threshold delays attributed.

4.2.4.1 This section covers trains that have no prior attributable threshold delay but have incurred several small delays below the normal explanation threshold and then suffer or cause a Reactionary Delay of at least as many minutes as the threshold (3 minutes or more for most Operators) and at the time of subsequent delay is the largest cause of lateness

Paragraph 4.2.4.2 has been reworded for improved clarity and consistency

4.2.4.2 If the train has been regulated correctly due to its own lateness, or has caused delay to another train, and it is known after investigation why it has previously lost time (e.g. several successive TSRs or examples of station overtimes) then separate Incident(s) should be created with a Delay Code describing the cause and attributed as per the appropriate section of this Guide. The Reactionary Delay of the regulation should then be attributed to and split between the incidents (as appropriate, including the initial sub threshold prime delays) – see principles in 4.1.6. When the below threshold delays are due to P-coded TSRs, the reactionary delay should be coded JB/IQ**, as per paragraph 2.6.7. Where possible, delays below the threshold should be attributed.

Paragraph 4.2.4.5 is a new entry to cover what is (or isn’t) considered cumulative delay being a much debated subject particularly when involving sub threshold delays.

4.2.4.5 Certain circumstances should be considered as Cumulative Delay in that they may be separate delays but due to the same cause / responsibility. Cumulative delay should be attributed to the same incident cause. Examples of cumulative delay are trains running on low power or TT delay (see 4.3.1.5.2). Unrelated station overtime delays and TSR delays should be considered separate causes and attributed to individual incidents with standard attribution rules applying to reactionary delay.

Paragraph 4.2.4.6 is also a new entry covering a threshold delay that is identified as being to more than one identified cause, again another area of debate and inconsistent application.

4.2.4.6 In circumstances where a threshold section delay is demonstrated to be a combination of known separate causes then this delay should be split into relevant sized delays and attributed to incidents with appropriate Delay Codes describing the cause. For example a 3 minute delay split to 1 minute in IR due to a TSR and 2 minutes in RB due to passengers loading

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Paragraph 4.2.4.7 has been added to further aid clarity and understanding by setting out examples of what is, and isn’t, considered cumulative delay with the rationale covered for each scenario.

4.2.4.7 Example scenarios of trains incurring several small delays and the application of cumulative delay Unless stated, all examples presume no other delays and no lateness recovered. The principles demonstrated in the examples shown apply equally to delay causes in the same section as well as different sections. The caveat being that the causes are identified (e.g. RB rather than RZ)

Sub Threshold Example 1 - Attribution of TSRs

TSR A – 2’ coded IS allocated to TIN X TSR B – 2’ coded IR allocated to TIN Y TSR C – 2’ coded JA allocated to TIN Z

The train arrives at destination 6 late and the return working has a 6 late start The 6 late start is split to 3 x 2’ delays and split into the 3 separate TSR TINs X, Y and Z

If there was a further 3’ delay on the inward journey in another TIN then the 6’ late start would be attributed to that TIN as the greatest impacting cause

Note: TSRs are identified causes with definitive delay codes and can potentially be 3 different causes and 3 different responsibilities, therefore 3 different incidents. Network Rail needs to capture and report all TSRs as separate causal incidents even where they are the same delay cause they are reported as individual events. The exception to this is Blanket Speed restrictions which will be captured in one incident for each DU Area Sub Threshold Example 2 - Attribution of Station Delays

Loading bike – 2’ coded RS allocated to TIN X Loading wheelchair – 2’ coded RQ allocated to TIN Y Late dispatch – 2’ coded R1allocated to TIN Z

The train arrives at destination 6 late and the return working has a 6 late start The 6 late start is split to 3 x 2’ delays and split into the 3 separate R* TINs X, Y and Z

If there was a further 3’ delay on the inward journey in another TIN then the 6’ late start would be attributed to that TIN as the greatest impacting cause

Note: Station delays are potentially 3 different causes and 3 different responsibilities, therefore 3 different incidents (exceptions such as door problem would be as underpowered trains below).

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Sub Threshold Example 3 - Attribution of TT incidents

Autumn A – 2’ coded TT allocated to TIN X Autumn B – 2’ coded TT allocated to TIN Y Autumn C – 2’ coded TT allocated to TIN Z

The train arrives at destination 6 late and the return working has a 6 late start The 6 late start is split to 3 x 2’ delays and split into the 3 separate TT TINs X, Y and Z

If there was a further 3’ delay on the inward journey in another (non leaf fall) TIN then the 6’ late start would be still be attributed to the TT TINs as they remain the greatest impacting cause. If one of the TT delays was a 3’ delay then the 6’ late start would be attributed to that TIN (cumulative leaf fall still outweighing any other cause)

Note: TT coded delay, per DAG 4.3.1.5.2 (main paragraph) and 4.3.1.8 (Example 4), is treated as cumulative despite being attributed to separate incidents.

Sub Threshold Example 4 - Attribution of an Underpowered Train

Underpowered delay A – 2’ coded MC in TIN X Underpowered delay B – 2’ coded MC in TIN X Underpowered delay C – 2’ coded MC in TIN X

The train arrives at destination 6 late and the return working has a 6 late start The 6 late start is attributed in full to TIN X

If there was a further 3’ delay on the inward journey in another TIN then the 6’ late start would still remain a reactionary to TIN X as it remains the greatest impacting incident cause.

Note: Underpowered train delays are the same loco / unit, same cause and same responsibility therefore the same incident. Operator reporting requirements on fleet reliability requires such faults / failures to be allocated to one incident.

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Amendments to Section 4.3 ADHESION, AUTUMN AND RAILHEAD TREATMENT INCIDENTS

This section has undergone a full review to ensure it remains appropriate for current operational procedures and attribution processes as well as taking the opportunity to improve general content.

Paragraph 4.3.1.4.1 has been enhanced with the addition of a further bullet covering provision of vegetation compliance and delivery plan for compliance.

4.3.1.4.1 Jointly agreed Neutral Zones Network Rail will agree with Train Operator(s) a list of locations where adhesion problems are common. These may be compiled from any supporting source, and are to be presented in the form of a list of affected TRUST delay sections. Examples of such sources are:

• Lists of sites vulnerable to low adhesion, as published in the Sectional Appendix. • TRUST sections where performance analysis shows delays in the autumn-related categories to be high. • List of sites where vegetation is non-compliant and vegetation plan delivery status.

Paragraph 4.3.1.4.2 has been amended slightly to be less process related.

4.3.1.4.2 Determining the level of ‘reasonable time-loss’ in a jointly-agreed Neutral Zone. Network Rail will also agree with Train Operators, in relation to the list above, the number of ‘Minutes Delay’ in a given delay section which shall normally be agreed as the maximum ‘reasonable time-loss’ for inclusion in the “Neutral Zone” incidents as described above. This agreement will be made between Lead Route and Operators which may include any bespoke agreements with non-lead Routes.

Paragraph 4.3.1.5 has been completely rewritten to be more succinct and specific as to what the ‘Neutral Zone’ concept is for, specifically to remove the ‘not fully understood’ element.

4.3.1.5 The ‘Neutral Zone’ concept The “Neutral Zone” is intended as a pragmatic approach to managing the increased level of delays experienced during the autumn period and is based upon ‘most likely’ cause principles.

Paragraph 4.3.1.6 has been reviewed and amended to improve clarity and brought in line with alterations made to the flowchart in 4.3.1.6.1.

Note 1 has been expanded to clarify that sections on a jointly agreed list can be reviewed and amended on the day of delay. (Note 2 and 3 remain the same)

4.3.1.6 Delays in TRUST sections not on jointly agreed Neutral Zones lists. The notes below relate to the annotated reference points in flow-chart 4.3.1.6.1

Note 1 The jointly agreed Neutral Zone list can be updated on the day in question and thus a poorly performing section can be agreed to be included real time (i.e. sections that are not included on a pre-agreed list can be subsequently agreed to be ‘switched on’ (or off) on the day due to prevailing conditions).

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Note 4 has been clarified in part to remove the much commented on ‘expeditiously as possible’ phrasing and replaced with per ‘Rule Book instructions’. This future proofs this section for any Rule Book changes for autumn reporting.

Note 4 For a Driver’s report of ERHC/LRA to be considered valid, the following criteria must be adhered to:

1. Was the report received in line with Rule Book instructions?

Note 5 has been completely rewritten as it was considered to be the main area of protracted resolution debates. In essence the DAG Guidance did not align appropriately with the Rule Book processes for site exams. Therefore referencing the relevant Rule Book processes (i.e the 30 minute rule) is considered the appropriate guidance.

Note 5 If the relevant Rule Book module is applied, even if the driver did not need to report the adhesion, then the process is applied as stated

The flowchart in 4.3.1.6.1 is now an amalgamation of the previous two flowcharts plus incorporating the third flowchart set out in the DAB Autumn Good Practice Guide. Predominantly this is to prevent referencing three different flowcharts when attributing and resolving autumn related delay.

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4.3.1.6.1 Autumn attribution: joint process: Chart 1

Safety of the Line Incident (SPAD / Otherwise unexplained Overshoot) delay

M*/M##* or TG/T##* or Driver or Train Related Is section included on Yes FC/F##* issue Yes jointly agreed list No Code to TO/FO (see note 1)?

No Adhesion Delay Reported TG/T##* or FC/F##* (pending investigation Yes Is it at a High Risk Site? Subsequent report findings) Yes received citing adhesion No Code to TO/FO as the cause of delay?

No

Have all Is section included on Have all Code to relevant prime Code to relevant prime No necessary mitigations Yes jointly agreed list No necessary mitigations No cause as per DAG 4.3.1.7 cause as per DAG 4.3.1.7 been applied? (see note 1)? been applied?

Yes Yes

Did driver report ERHC/LRA Per Rule Book requirement? (see note 4) Did the Driver report ERHC/LRA per No Was time loss Rule Book requirement (see note 4)? reasonable? No Code TW/FG No Yes Yes Code MP / TT / FT Was time loss as appropriate Code TT/FT Yes reasonable (see note 2)? Yes

No Cautioning Required and Normal Attribution Rules Should trains have been Apply: Agreed minutes to trains cautioned in line No No TT/FT. Excess minutes to with Rule Book TW1? cautioned? Operator MP / TT / FT as TG/FC appropriate

Yes Yes

Network Rail QI

Has Rule Book – 30 minute Has Site inspection taken Were trains required to be Network Rail QI No Yes No rule been applied? (See place? cautioned? note 5)

Yes Yes No

Normal Attribution Rules Is section included on Did train performing Apply: jointly agreed list No Was contamination found? No controlled stop confirm Code MP No Operator MP / TT as (see note 1)? poor rail conditions? appropriate

Yes Yes Yes Code TT/FT Yes Was time loss Continue cautioning: reasonable? Network Rail OE / JP / QI as appropriate

Code to relevant prime No Has suitable mitigation been No cause as per DAG implemented at the site? 4.3.1.7 Agreed minutes to TT/FT. Excess minutes to TG/FC Yes

QH

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The table set out under 4.3.1.7.1 has also been fully reviewed and amended to improve clarity and understanding. Only the circumstances with alterations are included below.

Circumstances ‘b’ and ‘e’ have been amended / added respectively to improve understanding of the use of Delay Code JP. Circumstance ‘f’ (the old ‘e’) now relates to the Rule Book requirements. Circumstance ‘g’ (the old ‘f’) has been clarified to cover the fact that cautioning will usually occur when contamination is ‘suspected’ as a Safety Measure. This was deemed more appropriate rather than the current ‘contamination present’ which caused debate when retrospective reports stated no contamination was found.

4.3.1.7.1 Guidance in respect of Network Rail attributable incidents No. Circumstances Delay Incident Attribution Code b. Vegetation within network boundaries is JP Network Rail (IQ**) not in accordance with prevailing Network Rail standards, including where signals or track side signs are obscured by vegetation and where trains strike branches - not due to the weather.

e. Contamination is present and agreed JP Network Rail (IQ**) vegetation measures are not completed f. Railhead examination not carried out in QI Network Rail (QQ**) line with Rule Book requirements after ERHC and/or LRA railhead report (as per chart 4.3.1.6.1 ) g. Cautioning of trains when contamination QI Network Rail (QQ**) is suspected or confirmed

Within 4.3.1.7.5 bullet 3 has been removed and bullet 4 has been rewritten to be clear that failure to treat the railhead, regardless of reason should be coded to failure to treat and not the reason it wasn’t treated (e.g. failure of the treatment train) – see also 4.3.2.3 below Bullet 5 covered the commercial arrangements between Network Rail and Operators for Operating treatment trains and was considered superfluous and was removed. (The first two bullets remain unaltered and are not shown below).

4.3.1.7.5 Principles of Railhead treatment attribution (to be taken to include all forms of treatment utilised by the Network Rail routes • Delays due to failure to complete the railhead treatment programme, for whatever reason, should be attributed in accordance with (DAG 4.3.2 see also DAG 4.3.1.7.4).

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The autumn attribution guidance in 4.3.1.8 has been enhanced in Example 4 with the scenario described currently being set out as a worked example. This is the one area where misapplication and debate has occurred previously (and supports the ‘cumulative’ amendments in 4.2.4 above)

4.3.1.8 Additional Guidance On The Attribution Of Reactionary Delays Incurred Related To Leaf- Fall And Adhesion Attribution. Example 4 Example Attribution to train 2A00

3’ coded TT allocated to TIN A 4’ coded TT allocated to TIN B 4’ coded TT allocated to TIN C 5’ coded TT allocated to TIN D 12’ coded IB allocated to TIN E

Train 2A00 then causes a 4’ reactionary delay to train 2B00.

The 4’ reactionary delay to 2B00 is attributed as reactionary to TIN D as the greater of the TT impacts

Two additional circumstances to the table 4.3.2.3 under Railhead Conditioning Trains have been made for clarity. Circumstance ‘k’ particularly supports the clarity sought in 4.3.1.7.5 above

4.3.2.3 Likely situations: j. Failure of a RHC train OM Network Rail (OQ**) k. Delays caused by the non-treatment of the OE Network Rail (OQ**) railhead as a result of circumstances i and j above

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Additions to Section 4.7.2 Waiting Train Crew

The exceptions covered under 4.7.2.3 have been enhanced to cover circumstances where train crew are booked ’passenger’ on trains ‘planned’ to be cancelled. This differentiates the circumstances from where unplanned disruption occurs but factors in the reduced mitigation opportunities for crews already on duty prior to planned changes being made for the next day.

4.7.2.3 Exceptions: d. If prior to working their train (after FH / TI Operator of train booking on duty), the relevant train-crew crew booked pass were booked to travel passenger on a (F##* / T##*) train that was a Planned Cancellation (i.e. P* coded in line with the 22.00 cut off the previous day as per DAG 3.1.5) - Where diagram commences post the 22.00 agreement deadline. e. If prior to working their train (after As appropriate Responsibility of booking on duty), the relevant train-crew to incident incident causing the were booked to travel passenger on a causing the Planned train that was a Planned Cancellation (i.e. Planned Cancellation P* coded in line with the 22.00 cut off the Cancellation previous day as per DAG 3.1.5) - Where diagram is already in operation prior to the 22.00 agreement deadline.

Amendment to Section 4.11 STATION OPERATING DELAYS

Circumstance ‘ag’ has been amended to Delay Code OZ (from OC). 4.11.2 Likely situations:

ag. Signaller prevents passage of train after OZ Network Rail request to recover item where item is not (OQ**) considered an obstruction of the line.

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Clarification to Section 4.13 POSSESSIONS AND INFRASTRUCTURE TRAINS INCIDENTS

This section has been fully reviewed and updated to improve understanding and application of incidents relating to possession overruns and delays to engineering trains involved with possession works. In the table for 4.13.1 below, only the circumstances amended or added are included.

4.13.1 Engineers ON-TRACK Equipment and Engineering Haulage Train Failure No. Circumstances Delay Code Incident Attribution c. “Yellow Plant” or Engineers’ train awaiting I7 Network Rail access to a possession site (including being organisation held at originating location for a late managing the starting possession). possession (IQ**) d. “Yellow Plant” or Engineers Train late I7 The Party responsible coming out of possession or work site due for the work site to the work in possession or work site where the problem running late or completing late. arose (IQ**). (NOT a Possession Overrun) e. “Yellow Plant” or Engineers Train late I5 The Party responsible coming out of possession or work site due for the work site to the work in the possession or work site causing the overrun running or completing late. (IQ**). (Possession Overrun) g. Engineers train late coming out of Where overrun Train Operator possession site due to waiting train-crew, is purely due to (F##*/M##*). vehicle fault or other train operator the train problem involved (all (Possession Overrun) works complete) and possession gives up on the train’s departure F*/M*/A* h. Engineers train late coming out of Where overrun Network Rail possession site due to waiting train-crew, is due to works organisation vehicle fault or other train operator incomplete managing the problem regardless of possession (IQ**) (Possession Overrun) any train issues I5 Note: Where a possession overrun is due to any work being incomplete, regardless of the circumstances above, delay code I5 should be used as set out in 4.13.2.5

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Circumstance ‘c’ has been enhanced to cover where engineering trains are held at originating point as well as outside the possession. It also clarifies that the possession manager is the responsible party for the late start of the possession (and not the root cause of the late start to the possession as was misinterpreted previously) Circumstance ‘d’ has been enhanced as an engineer’s train could come out late from a possession as the related works are running late - not all trains leave at the hand back of the entire possession and therefore not a possession overrun related delay. Circumstance ‘e’ is a new entry covering when the engineer’s train is late out of the possession when it is a possession overrun and that late start is a direct reaction to the overrun. Circumstances ‘g’ and ‘h’ have been added to clarify a commonly misunderstood difference in circumstances relating to engineering trains ‘causing’ overruns. In essence when the overrun is solely due to the train (not works related) then the appropriate Operator responsibility should be used. However, if the issue with the train has caused the physical works in the possession to overrun then it should still be classed as a possession overrun (works not complete) The note added at the foot of the table also reiterates the principle for the avoidance of doubt.

Paragraph 4.13.2.6 has been enhanced and clarified to cover the scenario where a possession is handed back but with assets left in failure mode (where those assets were part of the works within that possession) or where works are still not completed.

4.13.2.6 Where a possession is likely to, or has overrun (and a delay is likely to be caused owing to a late hand back), an incident should be created for each such event. The details to be recorded must include the identification of the nature of works being undertaken, the estimated time of overrun, line(s) affected, and details identifying from whom the information was received. The incident should then be attributed to Delay Code I5. For the purposes of attribution in accordance with this section, it should be noted that the term “Overrun” also includes the completion of any associated signalling work (associated with the possession) after the possession has been given up, in the event of such remedial works being required. It also includes the giving up of any OHLE or 3rd Rail isolation or asset left in failure mode (where associated with the possession works).

Paragraph 4.13.2.7 has been added to clarify that the late start of a possession (regardless of reason) has no bearing on the use of Delay Code I5 for any resulting overrun.

4.13.2.7 Possession overruns as a consequence of a late start to the possession (regardless of reason) should be coded to I5. A decision is required as to whether the work required to be undertaken will still enable the booked hand back time to be maintained or if the works will be reduced in scope or cancelled.

Paragraph 4.13.2.8 has been added to clarify (and distinguish from 4.13.2.6 above) that any asset that is left in failure mode (regardless of reason) but NOT related to the works within a possession should be coded to the respective asset failure.

4.13.2.8 Assets (unrelated to the physical possession works) left in failure mode after a possession is given up (regardless of reason for failure) should be allocated a delay code representing the asset failure.

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Paragraph 4.13.2.10 has been clarified to capture current process and reporting requirements whereby any delays relating to track patrols, including late hand back, should be coded to I6 to distinguish these from booked possessions (that would be coded I5).

4.13.2.10 Delay resulting from T2, T12 or GZAM possessions taken for the purpose of track inspections or patrolling should be allocated to an incident attributed with Delay Code I6. This includes where delay is caused by the agreed duration of a possession or block being exceeded. However, if the overrun has been the result of the inspection finding a defect requiring attention then the resulting delay should be allocated to an incident that reflects the nature of the defect found. T2, T12 and other blocks taken to rectify faults and defects should also be allocated to an incident attributed a Delay Code that reflects the need for the possession as per Section 4.12.1

The circumstances within 4.13.2.19 below have been fully reviewed to improve clarity and understanding. As before entries unaltered are not included.

Circumstance ‘e’ has been enhanced to clarify that an overrun due to works being incomplete, regardless of reason, should be coded to I5 as an overrun and NOT to the reason for the works being incomplete – and critically to specifically cover the inclusion of communications issues from site. Circumstance ‘f’ has been enhanced to reiterate circumstance 4.13.1g above so as to ensure it is not overlooked. Circumstance ‘n’ reiterates using I6 for patrols that are given back later than the agreed time as 4.3.2.10 above. Circumstance ‘o’ clarifies that if a patrol is given back late due to finding a defective asset then the relevant Delay Code for that asset should be utilised rather than I6. Again, reiterating 4.3.2.10. Circumstance ‘r’ covers that Delay Code I5 should be utilised for all possession overruns including where staff action / errors are the cause.

4.13.2.19. Circumstances and Exceptions e. Overrun of Possession due to incomplete I5 Network Rail works (regardless of reason) or due organisation managing communication issues to and from site. the possession or work site where the problem arose (IQ**) f. Overrun of Possession, solely due to the F* / M* / Train Operator (F##* / failure of an Engineers Train or On-Track A* M##*) Machine (where the offending train is still in situ and all works completed). g. Where the possession over-run is caused QB / QM Network Rail (QQA*). by problem with the train plan (either for trains booked to pass during the possession or engineering trains booked from the possession). k. Waiting for a line blockage to be given up I5 or I6 as Network Rail to pass a booked train during the planned appropriat organisation causing times of the possession or track patrol. e the overrun (IQ**). (Excluding track patrol blocks). If published any P* code allowance should be utilised.

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4.13.2.19 continued

n. Overrun of patrol beyond the agreed I6 Network Rail times (excluding where any defect is organisation managing found). the possession which overruns (IQ**). (Excess minutes only). o. Overrun of patrol as the result of a defect I*/J* As Per Section 4.12.1 found. As (Excess minutes only). applicable to asset. q. Overrun of possession, due to the removal I5 Network Rail of staff from a worksite(s) – regardless of organisation managing reason for removal. the possession which overruns (IQ**) r. Overrun of possession due to a I5 Network Rail substandard action or inaction of organisation managing maintenance staff or any agent working the possession which on behalf of the Possession Manager. overruns (IQ**)

Clarification and Amendments to Section 4.15.1 Mishaps and Major Safety Incidents

This section has been amended to be brought in line with the alterations made in the April 2016 DAG with the introduction of the Holding Code Process.

4.15.1.1 If an incident occurs on Network Rail infrastructure, for which the outcome of a Formal Inquiry, as convened in accordance with current group standards, is required to establish responsibility and this could lie with at least one Train Operator, then refer to the Holding Code section 4.15.4. If two or more Train Operators are responsible, a separate Incident may be required for the trains of each. The conclusion of the formal investigation may enable the attribution to be resolved and will allow the Incident(s) to be recoded as appropriate. In all other cases the Incident to be coded as per 4.15.1.2 and or 4.15.1.3

4.15.1.3 Particular codes: No. Circumstances Delay Code Incident Attribution e. Displaced conductor rail. I1 or where As appropriate to agreed use either Network Rail Holding Code (IQ**) or Operator of D* train concerned where Holding Code agreed

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SECTION 5: APPENDIX A – DELAY CODES

A full review of delay code descriptions and abbreviations was carried out with Industry Parties to improve both elements to not only assist in the application of the delay codes but to better inform downstream analysis and reporting capabilities.

Below can be found a few of the key description changes made as part of this review with comments to support as appropriate. The full suite of changes are highlighted in the DAG.

AG - Wagon load incident including adjusting loads or open door AX - Failure of off network infrastructure (FOC or private) AK - Safety incidents and mishaps (e.g. derailments, fire or chemical spill) in off Network Rail network freight yard or terminal (including private sidings, and stations – where it affects FOC services) FH - Planning issues including loco diagrams or RT3973 restriction not requested FL - Train cancelled at FOC request or planned not to run FX - Freight train running at lower class or speed than planned classification or overweight (Expanded to include trains overweight for improved identification) IQ - Trackside sign blown down, missing, defective, mis-placed IV - Earthslip/subsidence/breached sea defences (not the result of severe weather on the day of failure) (Expanded to clarify that IV - and not an X code - should be used when the failure occurs on a day not directly affected by the severe weather – i.e. X codes should only apply where the severe weather and failure occur on the same day) OD - Delayed as a result of Route Control decision or directive OP - Failure of TRUST or SMART system preventing recording and investigation of delay (Expanded to clarify that OP is only to be used where recording and investigation of delays is prevented and not where a Partie’s access to TRUST is lost and subsequently causes a delay) RC - Pre-booked assistance for a person with reduced mobility joining/alighting RK - Waiting passenger connections authorised by TOC but outwith TOC/Network Rail connection policy RL - Special Stop Orders authorised by TOC Control (including any delay at point of issue) RQ - Un-booked assistance for a person with reduced mobility joining/alighting RP - Passenger dropped object whilst boarding/alighting from train and train delayed at TOC request V8 - Train striking bird (pheasant or smaller) XA -Trespass (Including non-intentional) XC - Fatalities or injuries caused by being hit by train (Including non-intentional) XU - Sunlight on signal or dispatch equipment XV - Fire or evacuation due to fire alarm of Network Rail buildings due to vandalism (not including stations)

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Part 2: Process and Guidance Documents appended to the DAG

PGD1 – PRIME Cause definition / Examples (Issued September 2015) This Process Guide formally defines the term ‘Prime Cause’ (added to the April 2016 DAG) It is supported with examples of application by a number of common scenarios that should be used for briefing or referencing.

PGD2 – Reactionary Delay Attribution Examples (Reissued January 2016) This Process Guide contains explanations on how to allocate reactionary delays being a critical element of the attribution process. They are demonstrated with worked examples for what are considered the most common scenarios.

PGD3 – Y code application (Reissued April 2016) This Guide was derived from the brief that supported the Y code changes for the April 2015 DAG. It contains descriptions of all the Y codes and examples of usage.

PGD4 – Dispute and Resolution Process Guide (Issued September 2015) This Guidance Process was designed for Operators and Network Rail Routes covering disputes and resolution principles to enable timely attribution and resolution.

PGD5 – Delay Management TIN reattribution process (Issued September 2015) This Process Guide was designed for the reattribution of Management TINs including appropriate actions and timescales. It sets out there needs to be a common understanding of communication requirements between parties.

PGD6 – Joint Responsibility (Reissued April 2016) This Guidance Document sets out what does and doesn’t constitute Joint Responsibility and provides a reference table for the attribution of individual trains when joint responsibility criteria has been determined. Additionally it sets out some common examples of when Joint Responsibility does and doesn’t apply to aid understanding.

PGD7 – Holding Code (Issued March 2016) This guidance document sets out the appropriate use and processes to be applied by all Parties when considering an incident for Holding Code status. It prescribes what scenarios should and shouldn’t be considered for a Holding Code and covers the process to follow should a Holding Code be agreed

PGD8 – Delay Allocation Entering and Leaving the network (Issued May 2016) This guidance document covers various scenarios, in diagrammatic form, of delays caused to trains waiting to enter or leave the Network Rail network.

PGD9 – Delay Allocation Managing Freight Services (Issued May 2016) This guidance document covers various scenarios of freight trains retimed / rescheduled under the Managing Freight Services during Disruption (MFSdD) Control instructions and the attribution of any subsequent delays.

ALL THE PROCESS AND GUIDANCE DOCUMENTS CAN BE FOUND ON THE DAB WEBSITE http://www.delayattributionboard.co.uk/DAB%20Process%20and%20Guidance%20documents.html

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Delay Attribution Guide (DAG) Index September 2016

Subject Page Clause Specific Codes 3rd rail failure or defect 74 4.12.1.11 I1 3rd rail obstruction reason unknown 74 4.12.1.11 I2 3rd rail power supply failure or reduction 4.12.1.11 I4 3rd rail shoe beam faults on passenger trains 41 4.4.1.2.a M1 3rd rail switches,breakers,feeders or irregularities 74 4.12.1.11 I4 3rd rail trips vegetation 74 4.12.1.11 JP ABS brake and Brake system faults including wheel flats on train 42 4.4.1.2.h MN Absolute block failure 116 5i IG AC/DC trip when cause not known 78 4.12.4.2.b I2 Acceptance yard/siding (reactionary) 51 4.5.2.2.e Y* Acceptance yard/siding early running off network (PGD8) 51 4.5.2.2.d OB Acceptance yard/siding include adjacent off network incident (PGD8) 50 4.5.2.2.b A*/F*/M* Acceptance yard/siding Network Rail infrastructure defect 50 4.5.2.2.a I*/J*/X* Acceptance yard/siding no information provided 51 4.5.2.2.c AA Acceptance yard/siding off network freight terminals or yards 50 4.5.2.1 Accepted design limitations (ADL) operational constraints 74 4.12.1.15 ACI GSM-R ARS incorrect Rep No or berth 48 4.4.5.2.l OH ADD activations on passenger trains 41 4.4.1.2.a M1 ADD Automatic dropper device no fault found (train operator) 112 4.15.3.5 M1 ADD Automatic dropper device on OHLE electric traction. 78 4.12.4.2.e M1 Adhesion autumn leaf fall reactionary delays additional guidance 39 4.3.1.8 Adhesion contamination of railhead after spillage from train 38 4.3.1.7.3.b M* Adhesion equipment failure, on train during autumn 37 4.3.1.7.2.a M* Adhesion not autumn grease from flanger or railhead needs cleaning 38 4.3.1.7.3.a IZ Adhesion problems due to leaf fall contamination during autumn 37 4.3.1.7.1.d QH Adjusting loaded wagons,loading incident or open door 114 5a AG ADL box instructions signaller unable to mitigate 75 4.12.1.15.d I*/J* ADL causes an infrastructure failure 74 4.12.1.15.a I*/J* ADL causes no failure but still causes delay for further investigation 74 4.12.1.15.b ADL in box instructions signaller can mitigate 74 4.12.1.15.c OC ADL is not included in box instructions 75 4.12.1.15.e I*/J* ADL train schedule not taken into consideration 75 4.12.1.15.f QA/QM Air conditioning technical faults above solebar on a passenger train 41 4.4.1.2.d M8 Air systems technical faults below solebar on a passenger train 41 4.4.1.2.e MD Airport emergency rail network closed 109 4.15.1.3.v XZ Animal behaviour damage due to chronic repeated infestation 84 4.14.1.1 I*/J* Animal damage to infrastructure after removal requires work 84 4.14.1.3 I*/J* Animal damage to infrastructure removal rectifies without work 84 4.14.1.2 X8 Animal incursion not safety of line subsequent trains 86 4.14.1.8.1.c OC Animal incursion reported as safety of the line (4.14.1.7) 86 4.14.1.8.1.a I8/X8 Animal incursion reported by driver not safety of line.The reporting train 86 4.14.1.8.1.b FC/TG Animal infestation 84 4.14.1.1 I*/J* Animal strike flow chart 85 4.14.1.7 I8/FZ/MB/MQ/V8/VZ/X8 Animal sudden impact the animal not present at failure point 84 4.14.1.4 I8 Applicable timetable (ATT) the agreed train plan for the day 18 3.1.5 ARS controlled areas regulation 59 4.8.8 ARS failure 116 5i IF ARS GSM-R ACI incorrect Rep No or berth 48 4.4.5.2.l OH ARS software excluding schedule issue 119 5o OH Assault at a station 65 4.11.2.y VA Assault on passenger 108 4.15.1.3.i VB Subject Page Clause Specific Codes Asset overwhelmed weather 97 4.14.5.9 XT ATP no fault found train operator 112 4.15.3.5 M9 ATP or AWS failure with lineside equipment 116 5i IJ ATP train borne safety system faults on passenger trains 42 4.4.1.2.f MT Attaching vehicles station operating 121 5r RD Attribution examples 14 2.6.17 Attribution guide, the need for 7 1.1 Automatic reporting SMART berth errors 28 4.2.3 PT Autumn actions to mitigation. 33 4.3.1.4.3 Autumn adhesion equipment failure on a train 37 4.3.1.7.2.a M* Autumn application of attribution process 32 4.3.1.3 Autumn attribution. Joint process Chart 1 36 4.3.1.6.1 Autumn cautioning trains when contamination present 37 4.3.1.7.1.f QI Autumn concept of neutral zone 33 4.3.1.5 Autumn contamination but agreed vegetation measures completed 37 4.3.1.7.1.d QH Autumn delays not on jointly agreed neutral zone list. 35 4.3.1.6 Autumn failure to operate agreed railhead treatment program (4.3.2) 37 4.3.1.7.1.a Autumn jointly agreed neutral zones 32 4.3.1.4.1 Autumn leaf fall reactionary delays additional guidance 39 4.3.1.8 Autumn minutes in excess of agreed reasonable time loss in section 37 4.3.1.7.2.c TW/FG Autumn neutral zone incidents, the use of 34 4.3.1.5.2 Autumn principles 32 4.3.1.4 Autumn railhead conditioning train delays (RHC) including reactionary 37 4.3.1.7.1.c OS Autumn railhead examination failure to carry out after ERHC/LRA 37 4.3.1.7.1.e QI See 4.3.1.6.1/ 6.3 Autumn railhead manual treatment (4.3.2) 38 4.3.1.7.4 Autumn railhead treatment not applied at planned locations 37 4.3.1.7.1.e QI Autumn railhead treatment principles 38 4.3.1.7.5 Autumn reasonable level of time loss neutral zone 32 4.3.1.4.2 Autumn review of neutral zone 33 4.3.1.4.4 TT Autumn setting up neutral zone incidents. 33 4.3.1.5.1 Autumn SPAD or station overshoot at ERHC published site 37 4.3.1.7.2.b TG/FP Autumn special working for leaf fall track circuit operation 37 4.3.1.7.1.g QJ AWS no fault found train operator 112 4.15.3.5 M9 AWS or ATP failure with lineside equipment 116 5i IJ AWS train borne safety system faults on passenger trains 42 4.4.1.2.f MT Axle counter failure 117 5j J3 Back drive incorrect mechanical adjustment IB Balise activated train borne systems on passenger trains 42 4.4.1.2.k NA Balise ERTMS or ETCS 44 4.4.3 IM/M0 Balise TASS 44 4.4.2.1 NA/IM Bank holiday planned cancellation (3.2.8) 62 4.9.1.5 PE/PG Barrow crossing failure 116 5i ID Baseband data link problems IF Basis of attribution 17 3.1 Batteries technical faults below solebar on passenger trains 41 4.4.1.2.e MD Below threshold delays introduction 28 4.2.4.1 Below threshold delays sub threshold 11 2.5.4 Below threshold delays. Statement of good practice 3 viii Below threshold reaction P coded TSR incident 28 4.2.4.2 JB Berth errors automatic reporting SMART 28 4.2.3 PT Best endeavours regulation decision 57 4.8 OA Bicycles loading,unloading.Reserved presented late or not reserved 65 4.11.2.l RR/RS Birds strike including definition of size relating to pheasant 84 4.14.1.6 M*/I8/FZ/VZ/V8/X8 Subject Page Clause Specific Codes Blanket speed restriction for extreme heat, wind per group standards 91 4.14.5.4.f X4 Block failure 116 5i IG Blown fuse 110v or 650v 71 4.12.1.5 IH Boards defective or blown down 78 4.12.3 IQ Booked train crew not available service recovery (reactionary) 125 5y YN Booking on duty train crew 55 4.7.2.1/2 FE/TG/TH Bowmac dropped at level crossing IS Box instructions ADL is not included 75 4.12.1.15.e I*/J* Box instructions ADL signaller can mitigate 74 4.12.1.15.c OC Box instructions ADL signaller unable to mitigate 75 4.12.1.15.d I*/J* Brake and brake system faults including wheel flats on a train 42 4.4.1.2.h MN Brake tests running due to weather 100 4.14.5.12.e VW/MW Branches overhead striking not due to weather 37 4.3.1.7.1.b JP Breached sea defence not weather 69 4.12.1.2.i IV Bridge strikes involving road or waterborne vehicles 87 4.14.2 XP Bridge strikes rail vehicle (4.13.1 / 4.13.2) 87 4.14.2.1 Bridges structural 69 4.12.1.2.g JD Broken rail originally reported as a track circuit failure (TCF) 70 4.12.1.3.a IR Broken windows technical faults above solebar on a train not external 41 4.4.1.2.d M8 Buckled rails including high temperature 92 4.14.5.4.u IR Buildings encroaching NR infrastructure not weather or vandalism. 124 5x XO Buildings structural problems 69 4.12.1.2.g JD Bumps where cause unknown. 116 5i IT Burred Rail unless on a IBJ/IRJ then code IC IR Cab heaters technical faults above solebar on a passenger train 41 4.4.1.2.d M8 Cab secure radio (CSR) no fault found train operator 112 4.15.3.5 M9 Cab secure radio (CSR) off train legacy telecom equipment failures 73 4.12.1.8 I0 Cab secure radio (CSR) train borne safety system within the cab 41 4.4.1.2.b M0 Cable damage caused by on track machine J8 Cable failure due to vandalism 69 4.12.1.2.b XR/XB Cable fault 71 4.12.1.5 IA/IB/IC/IE/II/IH/XK/X4 Cable vandalism or theft 88 4.14.4.1.a XR Cancellation of a duplicate or erroneous schedule 120 5p PJ Cancellations which are unattributed 125 5z ZW Cancelled at train operators request passenger services 122 5t TB Cancelled due to planned engineering work 62 4.9.1.5 PE Cancelled freight including planned not to run or no specific reason 54 4.6.3 FL Categories of TRUST delay code and their default attribution 18 3.2 Catering loading supplies 122 5t T4 Catering staff including trolleys 64 4.11.2.d TK Cautioning of trains when contamination present during autumn 37 4.3.1.7.1.f QI CCTV system fault on a level crossing. IK Chair bolt broken or obstructing switch movement IS Change of aspects (COA) with no apparent cause 110 4.15.2.4.f IA Channel tunnel international locomotive failure,defect or attention 118 5m MF Channel tunnel late ex Europe freight or passenger 5f/t FN/TN Close Door(CD)/right away (RA) defect 66 4.11.2.ah IA Close Door(CD)/right away (RA) defect operator mitigation not made 66 4.11.2.ai R1 Close Door(CD)/right away (RA) sunlight on equipment 66 4.11.2.aj XU Close Door(CD)/right away (RA) sunlight operator mitigation not made 66 4.11.2.ak R1 Coaching stock delays on passenger trains 42 4.4.1.2.n ML Coaching stock on a freight train fault 43 4.4.1.3.c ML Coding guidance of TRUST incidents for consistency 7 1.1.2

Subject Page Clause Specific Codes Cold weather severe operating restrictions 100 4.14.5.12 Cold weather severe passenger charter excludable 90 4.14.5.1 V*/X* Commencement board for TSR/ESR defective or down 78 4.12.3 IQ Commercial agreement with no substantive delay reason 120 5q QT Communication cord or emergency train alarm pulled 123 5v VH Communication links between telecoms or signalling equipment 73 4.12.1.6 IK Concentrator System (CON) signalbox 73 4.12.1.7 IK Concert passengers joining or alighting. Special event 65 4.11.2.j R7 Condition of bridge temporary speed restriction (COB TSR) 77 4.12.2.4.g/h JD/PB Condition of track temporary speed restriction (COT TSR) 77 4.12.2.4.d/e PB/JS Conductor rail becoming displaced 108 4.15.1.3.e I1 Conductor,senior conductor or train manager or train guard 122 5t TH Congestion yard or terminal off network 114 5a AE Connections from other transport modes 121 5r/t RM/T3 Connections not authorised 64 4.11.2.h RI Connections TOC authorised but outside policy 64 4.11.2.g RK/TM Connections within policy (FOC) hourly or more frequency 64 4.11.2.f OW Connections within policy (FOC) less than hourly frequency 64 4.11.2.f YL Connections within policy not FOC) 64 4.11.2.e YL Contamination of railhead after spillage from train 38 4.3.1.7.3.b M* Contamination present agreed autumn vegetation measure completed 37 4.3.1.7.1.d QH Contamination present cautioning of trains during autumn 37 4.3.1.7.1.f QI Contingency plans and service recovery 64 4.10 Contractual exclusion 120 5p PZ Control freight Operating Company (FOC) directive 115 5f FZ Control Network Rail decision or directive 119 5o OD Control relay in interlocking normal relay (NR) or lock relay (LR) IF Control systems faults excluding track or driver based 42 4.4.1.2.i MY Control train operating company (TOC) directive 122 5t TR Coupler and coupler system faults excluding track or driver based 42 4.4.1.2.i MY Coupler no fault found after failure to couple train operator 112 4.15.3.5 M* Cover speed for track patrol unless published TSR 83 4.13.2.19.m I6 Cracked rail including broken, twisted, buckled or flawed 116 5i IR Crew doors delays associated with faults on doors 41 4.4.1.2.c M7 Crime at a station disorder,drunks,assaults,theft,vagrants 65 4.11.2.y VA Critical Rail temperature speeds (CRT) other than buckled rails 117 5j JH Cross boundary delays for VSTP 13 2.6.16 QN Cross boundary delays wrong regulation 13 2.6.15 OB Cumulative sub threshold delays (4.1.6.2) 29 4.2.4.5 Customer equipment breakdown or reduced capacity,off network 114 5a AH Customer information system failures (CIS / PIS) 65 4.11.2.r RV Cuttings 69 4.12.1.2.i IV Dangerous goods incident (DGI) or irregularity 108 4.15.1.3.a FA Dangerous goods marshalling 54 4.6.2.2.a FA Dangerous goods overloaded 54 4.6.1.2.a FA Data link problems IF DC/AC trip. 3rd rail or OHLE when cause not known 78 4.12.4.2.b I2 Defective traction or stock safety problem 110 4.15.2.4.j M* Definitions. Prime cause,primary delay and reactionary delay. 15 2.7 De-icer (RHC) (MPV) 40 4.3.2 OB/OE/OS/QA/QM/QN Delay attribution board (DAB) 8 1.5 Delay attribution process. Diagrammatic form 7 1.1.3 Delay investigation not made correctly mis-investigation 28 4.2.2.4 ON Subject Page Clause Specific Codes Delayed a train operators request passenger service 122 5t TB Delays un-investigated 119 5o OU Depot fleet delays 50 4.5.1.1 FZ/I*/J*/TZ//YE/OB/X* Depot operating problem including non severe weather 91 4.14.5.4.c MU Depot severe weather passenger fleet depot 91 4.14.5.4.k VW Derived delays sub threshold 11 2.5.4 Derived power supply failure of traction power supply 72 4.12.1.5b IH Detaching vehicles station operating 121 5r RD Diesel hauled freight train faults 42 4.4.1.3.a MC Different operator late start. Separate incident 55 4.7.1.2 Directive by train operating company 122 5t TR Disabled passengers joining or alighting. Pre booked or un booked 65 4.11.2.k RC/RQ Disorder at a station 65 4.11.2.y VA Dispatch incorrect by station staff 121 5r R1 Dispatch train equipment failure Network Rail but not telecoms 117 5j J2 Distribution network operator(DNO)/distribution point electrical supply 71 4.12.1.5 IA/IB/IC/IE/II/IH/XK/X4 Divert at FOC request. Freight trains 115 5f FK Divert engineering work planned not timetabled out of ROR/EAS 120 5q QB Divert from booked route or line delayed by (reactionary) 125 5y YP Divert planned engineering work not timetabled within ROR/EAS 120 5p PF Diverted not included contingency plan no route knowledge 64 4.10.1.b Diverted per pre arranged contingency plan, no route knowledge 64 4.10.1.a FH/TI DOO CCTV monitors,mirrors station platforms when NR telecoms 73 4.12.1.7 IK DOO monitors when Network Rail maintained 74 4.12.1.13 IK Door delays associated with faults on doors & associated systems 41 4.4.1.2.c M7 Door open on non passenger train 109 4.15.1.3.l FZ Door open on passenger train 109 4.15.1.3.k M*/R*/T*/V* Drive train technical faults below solebar on a passenger train 41 4.4.1.2.e MD Driver adhering to company professional driving standards or policy 5f/t FGTW Driver adhering to company professional driving standards weather 92 4.14.5.4.y VR Driver freight or passenger operator 5f/t FC/TG Driver GSM-R error including entering wrong registration code 48 4.4.5.2.f FC/TG Driver GSM-R fails to de register radio 48 4.4.5.2.e FC/TG Driver TPWS adhering to company professional driving standards 49 4.4.6.1.b TG/TW Dropped bowmac at level crossing IS Drunks at a station 65 4.11.2.y VA Dry slide chairs IB DSD train borne fault safety system within the cab passenger train 41 4.4.1.2.b M0 Duplicate delay excess minutes 28 4.2.1 PJ Early running and out of path control agreement 58 4.8.7.c OD Early running and out of path result of a known incident 58 4.8.7.e Y* Early running at request of driver or shunter that signaller agrees to 58 4.8.7.d OC Early running regulation error at point of delay 58 4.8.7.a OB Early running regulation not held at prior regulating point 58 4.8.7.b OC Earth slip,subsidence or breached sea defences not weather on day 116 5i IV Earthworks temporary speed restriction (TSR) 77 4.12.2.4.i/j IV/PB Electric hauled freight train faults 42 4.4.1.3.b MB Electric technical faults below solebar on a passenger train 41 4.4.1.2.e MD Electric train OHLE ADD 78 4.12.4.2.e M1 Electrical control room (ECR) (IVRS) 73 4.12.1.9 J0 Electrical distribution supply chain or board national grid 71 4.12.1.5 IA/IB/IC/IE/II/IH/XK/X4 Electrification 74 4.12.1.11 I1/I2/I4/JP Embankments 69 4.12.1.2.i IV Subject Page Clause Specific Codes Emergency possessions 80 4.13.2.3 I*/J*/Q*/X* Emergency speed restrictions (ESR) derailment 77 4.12.2.4.l Emergency speed restrictions (ESR) infrastructure problem 77 4.12.2.4.k I*/J* Emergency speed restrictions (ESR) overview 76 4.12.2 Emergency speed restrictions (ESR) rolling contact fatigue or GCC 77 4.12.2.4.m JS Emergency speed restrictions (ESR) work not completed 77 4.12.2.4.c JG Emergency train alarm pulled (communication cord) 123 5v VH Encroaching objects NR infrastructure not weather or vandalism. 124 5x XO Engineering access statement temporary speed restrictions (TSR) 77 4.12.2 Engineering trains 79 4.13.1 MV/I7/I5 Engineering trains incentivised performance scheme (4.13.1) 23 4.1.4.1 Engineering work/divert SLW planned not timetabled out of ROR/EAS 120 5q QB Engineering work/divert SLW planned not timetabled within ROR/EAS 120 5p PF Engineers on track equipment 79 4.13.1 MV/I7/I5 Engineers OTM failure or problem 43 4.4.1.4.c MV Engines technical faults below solebar on a passenger train 41 4.4.1.2.e MD Equipment breakdown/reduced capacity customer or yard off network 114 5a AH ERHC Railhead examination failure to carry out (4.8.6.1/4.8.6.2) 37 4.3.1.7.1.e QI Erroneous or duplicate schedule cancellation 120 5p PJ ERTMS on board over riding driver command 122 5t TS ERTMS or ETCS failure,excluding communications links and balises 74 4.12.1.14 J7 ERTMS or ETCS incorrect operation of on board equipment 115 5f FI ERTMS or ETCS no fault found train operator 112 4.15.3.5 M* ERTMS or ETCS Signaller wrong instructions 119 5o OC ERTMS or ETCS track mounted infrastructure balise system fails 44 4.4.3.1.b IM ERTMS or ETCS train borne system fails 44 4.4.3.1.a M0 ERTMS train borne fault safety system within the cab passenger train 41 4.4.1.2.b M0 Escalator failure at a station including lifts 65 4.11.2.q RE Evacuation due to fire alarm NR buildings not stations due to vandals 124 5x XV Evacuation Network Rail buildings other than stations not vandals 119 5o OV EWAT initiated by route controls. RED alert 90 4.14.5.1 V*/X* Examination of railhead failure to carry out after ERHC/LRA 37 4.3.1.7.1.e QI See 4.3.1.6.1/ 6.2 Examples of attribution 14 2.6.17 Exceptional loads (RT3973) train schedules 60 4.9.1.2.f/g QA/QM/FH/TA Excess minutes duplicate delay or excess minutes 28 4.2.1 PJ Exclude from performance regime or contractually 20 3.2.7/8 P* Exclusion agreed between Network Rail and train operator 120 5p PL External causes other responsibility of Network Rail 124 5x XZ External impact incidents animal incursions,strikes and infestations 84 4.14 I*/J*/X8 External passenger charter excludable criteria due to weather (3.2.6) 90 4.14.5.1 V*/X* External passenger other responsibility of TOC 123 5v VZ External power supply failure at a station 65 4.11.2.t VZ External supplier power failure 69 4.12.1.2.k XK External trees, buildings, objects encroaching NR infrastructure 124 5x XO Extreme heat or wind,blanket speed per group standards 91 4.14.5.4.f X4 Failure of ERTMS or ETCS balise system 44 4.4.2 IM/M0 Failure of FOC owned infrastructure off network 74 4.12.1.12 AX Failure of RHC train 40 4.3.2.3.j OM Failure to call or stop joint responsibility incidents (PGD6) 22 4.1.3.9 Failure to mitigate 23 4.1.5 Falling from a train onto platform fatalities or injuries 87 4.14.3.2.c VC Falling snow and fog regulations with semaphore signalling 92 4.14.5.4.p X1 False fire alarms. 104 4.14.8.1.e-i AK/OJ/RH/VF/XB Subject Page Clause Specific Codes Fatalities including struck by train (PGD6) 87 4.14.3.2 XC/VC/AZ/FZ Fencing adequately maintained vandalism and theft 88 4.14.4.1.b XB Fire caused by a traction unit 104 4.14.8.1.c M* Fire external not prevent passenger access to or from train at station 104 4.14.8.1.d XL Fire fleet depot 105 4.14.8.1.k VF/MU Fire flowchart. Identifying attribution of various types of fire and alarms 106 4.14.8.8 AK/M*/O*/RH/VF/X* Fire freight yard,terminal or private yard off network 105 4.14.8.1.j AK Fire line side on Network Rail infrastructure. 104 4.14.8.1.a I9 Fire Network Rail buildings other than stations not vandal / vandal 104 4.14.8.1.h OV / XV Fire Network Rail managed stations definition (4.14.8.1) 105 4.14.8.6 Fire off network the effect of fire cautioning or stopping due to smoke 105 4.14.8.7 XL Fire on freight train 105 4.14.8.1.m MD/M8/VF Fire on passenger train 105 4.14.8.1.l MD/M8/VF Fire station buildings or platform affecting FOC trains booked to stop 105 4.14.8.1.i AK Fire station buildings or platform failed to stop not vandalism 104 4.14.8.1.e RH Fire station buildings or platform failed to stop vandalism 104 4.14.8.1.e VF Fire station buildings or platform no train stops passengers not vandal 104 4.14.8.1.g OJ Fire station buildings or platform no train stops passengers vandalism 104 4.14.8.1.g XB Fire station buildings or platform regular trains not call not vandalism 104 4.14.8.1.f OJ Fire station buildings or platform regular trains not call vandalism 104 4.14.8.1.f XB Fire station false alarms 104 4.14.8.1.e RH/VF Fish plate defective 116 5i IS Flanger grease causing adhesion problems 38 4.3.1.7.3.a IZ Flawed rail 116 5i IR Fleet depot delays 50 4.5.1.1 FZ/I*/J*/TZ/X*/YE/OB Fleet problems weather non severe 91 4.14.5.4.d MW Fleet problems weather severe 91 4.14.5.4.l VW Fleet restriction snow or Ice 100 4.14.5.12.f VW/MW Flooding affecting other forms of transport 101 4.14.6.4.b X2 Flooding burst pipes out of Network Rails control 101 4.14.6.4.c XM Flooding drainage inadequately maintained 101 4.14.6.4.a JK Flooding due to weather further guidance (4.14.5.7) 100 4.14.6 X2 Flooding flow chart for weather (4.14.6) 95 4.14.5.7 Flooding freight yard off network 101 4.14.6.4.e AZ Flooding not due to exceptional weather 117 5j JK Flooding obstructions on line including trees 91 4.14.5.4.j X2 Flooding station access passengers 101 4.14.6.4.g VZ Flooding station buildings 101 4.14.6.4.d RW Flooding TOC/FOC restriction directive affecting traction 101 4.14.6.4.f MW Fog and falling snow regulations, semaphore signalling 92 4.14.5.4.p X1 Fog semaphore signals visibility due to weather (4.14.5.12.b) 92 4.14.5.4.aa X1 Foot crossing failure 116 5i ID Formal inquiry incident. Possible operator responsibility (4.15.4) 108 4.15.1 Formal inquiry including OHLE Incident 78 4.12.4.2.g Forms signaller completion of RT3185/7 trains overlooked 111 4.15.2.5 OC Freight adjusting loaded wagons, loading incident or open door 114 5a AG Freight diesel hauled train faults 42 4.4.1.3.a MC Freight electric hauled train faults 42 4.4.1.3.b MB Freight operating company cause to be specified or marshalling. 114 5a AZ Freight operator unexplained believed to be due to operator 28 4.2.2 FO Freight planning issue including loco diagram or RT3973 not requested 115 5f FH Freight terminal or yards or none Network Rail operated Off Network 51 4.5.3 Freight train driver 115 5f FC Subject Page Clause Specific Codes Freight train held at FOC request Freight train 115 5f FJ Freight train running at lower than planned classification or overweight 115 5f FX Freight train wagons or coaches fault 43 4.4.1.3.c ML Frost flow chart weather, delay code guidance 97 4.14.5.9 Frost or Snow defective point heaters points failure 116 5i IP Frost,snow or ice non severe affecting infrastructure equipment 116 5i IW Frozen couplers mitigation not applied weather affecting the train 42 4.4.1.2.j MW Functional supply points (FSP) 72 4.12.1.5b IH Fuse blown 110v or 650v 71 4.12.1.5 IH Gangway doors delays associated with faults on doors & associated 41 4.4.1.2.c M7 Gas,water mains or overhead power lines national grid 124 5x XM Gauge Corner Cracking (GCC) / RCF emergency speed restriction 77 4.12.2.4.m JS Gearbox technical faults below solebar on a passenger train 41 4.4.1.2.e MD Good practice statement 3 Grease, oil or substance on railhead source can not be identified 38 4.3.1.7.3.d OZ Ground frame telephones 73 4.12.1.7 IK GSM-R ARS ACI incorrect Rep No or berth 48 4.4.5.2.l OH GSM-R cab based equipment vandalised 48 4.4.5.2.h VA/FZ GSM-R cab radio software fault 49 4.4.5.2.p J0 GSM-R call picked up by wrong mast and wrongly routed 48 4.4.5.2.g J0 GSM-R driver error including entering wrong registration code 48 4.4.5.2.f TG/FC GSM-R driver fails to de register radio 48 4.4.5.2.e TG/FC GSM-R fault on Network Rail infrastructure no fault identified 48 4.4.5.2.c I0 GSM-R fault on train no fault found. 48 4.4.5.2.d M9 GSM-R fault with infrastructure or signalling based equipment 48 4.4.5.2.a J0 GSM-R hardware fault on train, cause identified 48 4.4.5.2.b M0 GSM-R infrastructure maintenance staff error 48 4.4.5.2.j JL GSM-R infrastructure or signal centre based equipment vandalised 48 4.4.5.2.i XB GSM-R no fault found train operator 112 4.15.3.5 M* GSM-R operational system faults and failures. Flow chart 47 4.4.5.1 TG/FZ/J0/MD/M8/M9 GSM-R REC error from cab by authorised person on network 46 4.4.4.1.d TG/FC/TH/TZ GSM-R REC error from cab by train maintenance staff on network 46 4.4.4.1.e MU GSM-R REC error from cab off network 46 4.4.4.1.f MU/TG/FC/TH/TZ GSM-R REC error from cab off network preventing access to network 46 4.4.4.1.g MU GSM-R REC from cab by unauthorised person no operational event 46 4.4.4.1.h VA/RZ/FZ GSM-R REC initiated by a none TAC party from off network 46 4.4.4.1.c XZ GSM-R REC initiated by Network Rail maintenance staff in error 46 4.4.4.1.j JL GSM-R REC initiated by signaller in error 46 4.4.4.1.i OC GSM-R REC operational event safety reported in good faith. 46 4.4.4.1.a GSM-R REC unable to identify responsible part no technician report 46 4.4.4.1.b J0 GSM-R registration failure signaller entering wrong Rep No or TD berth 48 4.4.5.2.k OC GSM-R registration failures, no technical or responsibility identified 48 4.4.5.2.m J0 GSM-R signal on train lost no cause identified no other trains affected 49 4.4.5.2.o J0 GSM-R technical registration failure 48 4.4.5.2.m J0 GSM-R telecommunications equipment in line side equipment room 72 4.12.1.5b J0/IK GSM-R train borne fault safety system within the cab passenger train 41 4.4.1.2.b M0 Guidance on responsibility and coding of delay incidents 21 4 Guidance where no fault found (NFF) technical equipment 111 4.15.3 GZAM Green zone access manager possessions 80 4.13.2.9 I6 Headlight out or showing wrongly 110 4.15.2.4.k TJ/FM Heat blanket restriction per group standards 91 4.14.5.4.f X4 Heat flow chart weather delay code guidance 96 4.14.5.8 Heat severe affecting infrastructure NR responsibility not for speeds 124 5x XH Subject Page Clause Specific Codes Heavy axle weight restrictions (RT3973) (schedules) 60 4.9.1.2.f/g QA/QM/FH/TA High temperature buckled rails 92 4.14.5.4.u IR High winds flow chart weather 94 4.14.5.6 Holding codes pending investigation (PGD7) 112 4.15.4 D* Horn train borne fault safety system within the cab (passenger) 41 4.4.1.2.b M0 Hot axle box (HABD) confirmed activation or positive on train 108 4.15.1.3.c MT Hot axle box (HABD) no fault found (NFF) Network Rail 112 4.15.3.5 IN Hot axle box (HABD) no fault found (NFF) or wrong detection (4.15.3) 108 4.15.1.3.d IN Hot axle box (HABD) on board train no fault found train operator 112 4.15.3.5 Hot axle box (HABD) train borne safety system faults passenger train 42 4.4.1.2.f MT Ice flow chart weather delay code guidance 97 4.14.5.9 Ice on OHLE or conductor rail due to failure to run de-icing train 91 4.14.5.4.h OE Ice on OHLE or conductor rail unless due to failure of de-icing train 91 4.14.5.4.g OG Ice or water on running railhead (4.14.5.9) 38 4.3.1.7.3.c MP Ice,snow or frost non severe affecting infrastructure equipment 116 5i IW Icicles hanging from NR infrastructure train damage or severe weather 92 4.14.5.4.t XT Ill passenger on platform 121 5r RO Ill passenger on train 123 5v VD Incident within network yard or terminal causing terminal delays 53 4.5.4.2.e Incidents allocation of minutes and reliability events to an organisation 12 2.6 Incidents arising out of other access agreements 23 4.1.4 Incidents at stations flow chart guidance for the allocation of delays 68 4.11.11 Incorrect marshalling not dangerous goods 54 4.6.2 AZ Incorrect routing on an agreed diversionary route 58 4.8.5 OC Incorrect routing the driver not stopping and taking route.Two incidents 58 4.8.6 OC and TG/FP Incorrect train dispatch by station staff 121 5r R1 Index of various scenarios contained in the DAG 27 4.1.7 Industrial action causing un-planned delays. 109 4.15.1.3.w Infestation damage due to repeated chronic animal behaviour 84 4.14.1.1 I*/J* Infrastructure based equipment no fault found Network Rail(4.15.1.3.d) 111 4.15.3.1 IN Infrastructure defect Network yard or terminal (4.5.1) 53 4.5.4.2.a I*/J*/X* Infrastructure failure accepted design limitations (ADL) 74 4.12.1.15.a I*/J* Infrastructure failure weather equipment outside design 91 4.14.5.4.b X* Infrastructure failure weather equipment within design 91 4.14.5.4.a I*/J* Infrastructure off network 69 4.12.1.2.a AX/TX Infrastructure other code IZ when not to be used 75 4.12.1.18 IZ Infrastructure privately owned off network 74 4.12.1.12 AX Infrastructure staff oversight or error including maintenance staff 117 5j JL Infrastructure trains arriving or leaving possessions 81 4.13.2.14 I7 Infrastructure vandalism or theft 88 4.14.4.1 Injury including fatalities stuck by a train (PGD6) 87 4.14.3.2 XC/VC/AZ/FZ Injury sustained when on platform struck or falling from train 123 5v VC Injury to member of staff 109 4.15.1.3.j Injury to passenger accidental 108 4.15.1.3.h M*/R*/T*/V* Inquiry possible operator responsibility (4.15.4) 108 4.15.1 Insulated block or rail joint (IBJ / IRJ) does not cause a track fault 70 4.12.1.3.b IC Insulated block or rail joint (IBJ / IRJ) fault within joint 70 4.12.1.3.b IS Internal lighting technical faults above solebar on a passenger train 41 4.4.1.2.d M8 International channel tunnel locomotive failure defect or attention 118 5m MF Investigation of a delay not made correctly mis-investigation 28 4.2.2.4 ON Investigation pending holding codes 112 4.15.4 D* Inward booked train crew (reactionary) 125 5y YJ Inward stock or unit late arrival booked (reactionary) 125 5y YI Subject Page Clause Specific Codes Items cause obstruction,include trees not vandal,weather or from train 117 5j JX Items miscellaneous on OHLE other than vandalism 78 4.12.4.2.c I*/X* IVRS Interactive voice radio system 73 4.12.1.9 J0 IVRS Interactive voice radio system no fault found. Network Rail 112 4.15.3.5 IN Joint incidents at stations (PGD6) 23 4.1.3.13 Joint responsibility criteria not applying (PGD6) 22 4.1.3.12 Joint responsibility incidents including exceptions (PGD6) 21 4.1.3 Joint responsibility vandalism, theft or trespass (PGD6) 89 4.14.4.2 Jointly agreed neutral zones for autumn 32 4.3.1.4.1 Key route strategy (KRS) weather snow 91 4.14.5.4.m/n IW/XT Landslide or landslip 69 4.12.1.2.i IV Late arrival of booked inward stock or unit (reactionary) 125 5y YI Late arrival of booked train crew (reactionary) 125 5y YJ Late from Europe freight/passenger 115 5f/t FN / TN Late running possession principal incident causing train to be late 81 4.13.2.17 Late running train booked crew service recovery (reactionary) 125 5y YN Late start different operator 55 4.7.1.2 Late start from origin not train crew 55 4.7.1 Late start late inwards 55 4.7.1.1 Y* Late start mitigation 55 4.7.1.3 Late start network yard crew,vehicles,loading or FOC issue 53 4.5.4.2.b A*/F*/M* Late start stock change 55 4.7.1.5 Late start train crew (4.7.2) 55 4.7.1.4 Late start unexplained 125 5z ZX LDT Long distance terminal module failure IF Leaf fall contamination adhesion problems during autumn 37 4.3.1.7.1.d QH Leaf fall contamination cautioning during autumn 37 4.3.1.7.1.f QI Leaf fall contamination during autumn 70 4.12.1.3 c QJ Leaf fall during autumn 32 4.3 Leaf fall operation Special working implemented for track circuits 37 4.3.1.7.1.g QJ Leaking wipers weather delays associated with passenger train 42 4.4.1.2.j MW Level crossing CCTV system fault. IK Level crossing failure,barrow,foot crossings, treadles and damage 109 4.15.1.3.m ID Level crossing misuse 109 4.15.1.3.n XD Level crossing obstacle detection (LIDAR) not identified or NFF ID Level crossing road related incidents external 69 4.12.1.2.c XD Level crossing salt from road. 69 4.12.1.2.f XN Level crossing telephones (LCT) (both Network Rail and BT lines) 73 4.12.1.7 IK Level Crossings CCTV DOO telecoms cable feed 73 4.12.1.7 IK Lift failure at a station including esculators 65 4.11.2.q RE Lifting bridge failure 69 4.12.1.2.h JD Lightning strike on Network Rail assets no protection 92 4.14.5.4.r J6 Lightning strike on Network Rail assets with protection 92 4.14.5.4.s X3 Lights internal technical faults above solebar on a passenger train 41 4.4.1.2.d M8 Line search by Police 124 5x XF Lineside cable fault signalling 116 5i II Lineside location cabinet 71 4.12.1.5 IA/IB/IC/IE/II/IH/XK/X4 Lineside telephones 73 4.12.1.7 IK Link in Location cabinet causing track circuit to fail IC Link or defect track repeater relay or elsewhere in the indication circuit IF Litter causing a points or track circuit failure (TCF) failure JX Loading excessive luggage 121 5r RT Loading problems freight not dangerous goods including adjusting 54 4.6.1.1 AG Subject Page Clause Specific Codes Loading supplies including catering 122 5t T4 Location cabinet 71 4.12.1.5 IA/IB/IC/IE/II/IH/XK/X4 Loss in running unexplained 29 4.2.4 ZZ Lost luggage 121 5r RU Lost path followed train running less late (reactionary) 125 5y YC Lost path following another later running train (reactionary) 125 5y YD Lost path regulated for another late running train (reactionary) 125 5y YB Lost path regulated for train running less late (reactionary) 125 5y YA Lower priority train regulation 119 5o OB LRA railhead examination failure to carry out (4.3.1.6.1/2) autumn 37 4.3.1.7.1.e QI Luggage excessive loading 121 5r RT Luggage lost 121 5r RU LUL delays on non Network Rail lines not T&RS 122 5t TX LUL passenger charter excludable events 123 5v VW Maintenance depots for fleet 50 4.5.1.1 FZ/I*/J*/TZ/X*/YE/OB Maintenance of vegetation per standards Network Rail boundaries 37 4.3.1.7.1.b JP Maintenance staff error GSM-R infrastructure staff 48 4.4.5.2.j JL Management freight services during disruption (MFSDD) (PGD9) 62 4.9.1.7 PGD9 Manual treatment of railhead during autumn (4.3.2) 38 4.3.1.7.4 Marker light out or showing wrongly 110 4.15.2.4.k FM/TJ Marshalling dangerous goods 54 4.6.2.2.a FA Marshalling incorrect not dangerous goods 54 4.6.2 AZ Marshalling late arrival part of train 54 4.6.2.2.b YI Marshalling signaller wrong order or platform 54 4.6.2.2.c OC Masonry encroaching NR infrastructure not weather or vandalism. 124 5x XO Measuring and recording the cause of delay 11 2.5 Minutes delay not apparently due to Network Rail (4.2.4) 28 4.2.2 FO/TO Miscellaneous items on OHLE other than vandalism 78 4.12.4.2.c I*/X* Misdirected passengers, station staff error 121 5r R5 Mishaps and major safety incidents (4.15.4) 108 4.15.1 Mishaps freight 115 5f FZ Mishaps other infrastructure clause 116 5i IZ Mishaps station operating causes 121 5r RY Mishaps train operating company cause 122 5t TY Misinvestigation of a delay 28 4.2.2.4 ON Mistaken report infrastructure categorically proved mistaken report 111 4.15.2.4.o J5 Misuse of level crossing 109 4.15.1.3.n XD Mitigation during autumn 33 4.3.1.4.3 Mitigation failure to do after reasonable request (4.1.3.10) 23 4.1.5.2 Mitigation resource crew/stock conflicts,errors,omission freight 63 4.9.2.6.d T* Mitigation resource crew/stock conflicts,errors,omission passenger 62 4.9.2.3.d T* Mitigation timetable contains conflicts, errors, omissions freight 63 4.9.2.6.c OD/QN Mitigation timetable contains conflicts, errors, omissions passenger 62 4.9.2.3.c OD/QN Module on points failure IF Multi purpose vehicles (MPV) (RHC) 40 4.3.2 OB/OE/OS/QA/QM/QN Multicore cable failure one or more cores defective telecoms cable IK Multiple worksite possessions 81 4.13.2.12 National grid including power failures 71 4.12.1.5 IA/IB/IC/IE/II/IH/XK/X4 Network code 8 1.2 Network delays (2.5.3) 76 4.12.2.3 Network Rail control decision or directive 119 5o OD Network Rail maintenance staff REC GSM-R initiated in error 46 4.4.4.1.j JL Network Rail managed station delays 67 4.11.4

Subject Page Clause Specific Codes Network Rail managed stations (definition). Security alert (4.14.7.1) 102 4.14.7.6 Network Rail managed stations fire, definition (4.14.8.1) 105 4.14.8.6 Network Rail manager codes 12 2.6.7 Network Rail manager codes attribution examples 14 2.6.17 Network Rail operating cause 119 5o OZ Network Rail operating staff issue not signaller or control 119 5o OK Network Rail staff oversight or error 117 5j JL Network yard late start crew,vehicles,loading or FOC issue 53 4.5.4.2.b A*/F*/M* Network yard or terminal delays entering/leaving incident within 51 4.5.2.3 Network yard or terminal infrastructure defect (4.5.1) 53 4.5.4.2.a I*/J*/X* Network yard or terminal waiting acceptance due to late running 53 4.5.4.2.c/d Y* Neutral zone autumn attribution 32 4.3.1.4.1 Neutral zone concept autumn 33 4.3.1.5 Neutral zone incidents setting up during autumn 33 4.3.1.5.1 Neutral zone incidents use of during autumn 34 4.3.1.5.2 Neutral zone list during autumn delays not on jointly agreed list 35 4.3.1.6 Neutral zone reasonable level of time loss autumn 32 4.3.1.4.2 Neutral zone review during autumn 33 4.3.1.4.4 No cause found (4.15.3) 110 4.15.2.3 No fault found infrastructure based equipment Network Rail(4.15.1.3.d) 111 4.15.3.1 IN No fault found safety incident infrastructure public report 111 4.15.2.4.n J4 No fault found safety incident Network Rail staff unable to find 111 4.15.2.4.m No fault found technical equipment guidance 111 4.15.3 No fault found train borne equipment (train operator) 111 4.15.3.3 F*/N*/M*/T* No fault found train borne systems on freight trains (4.15.3) 43 4.4.1.3.d M9 No fault found train borne systems on passenger trains (4.15.3) 42 4.4.1.2.l M9 Non malicious injury to passenger 64 4.11.2.b VD Non Network Rail lines passenger charter excludable 123 5v VW Non Network Rail running lines such as LUL (not T&RS) 122 5t TX Non severe weather snow,ice or frost affecting infrastructure equipment 116 5i IW Not leaving network by train leaving Network (reactionary) 125 5y YT NRN no fault found train operator 112 4.15.3.5 M* NRN off train or telecom equipment failures legacy communications 73 4.12.1.8 I0 NRN train borne fault safety system within the cab passenger trains 41 4.4.1.2.b M0 Objects encroaching NR infrastructure not weather or vandalism 124 5x XO Objects placed deliberately on Network Rail infrastructure incl points 88 4.14.4.1.b XB Objects thrown or fired at trains 88 4.14.4.1.b/c XB/VB/AZ Objects thrown or fired from trains 89 4.14.4.1.f VB Objects thrown or fired onto Network Rail from fleet depots 89 4.14.4.1.e MU Obstruction hit by train,include trees not vandalism,trespass,weather 110 4.15.2.4.h/i JX Obstruction on line due to flooding including trees 91 4.14.5.4.j X2 Obstruction on line due to wind including trees 91 4.14.5.4.i XW Obstruction safety confirmation of reported obstruction 110 4.15.2.4.g JX OCB OHLE trip cause not known including obstruction 78 4.12.4.2.b I2 Off network freight terminals/yards waiting acceptance yard/siding 50 4.5.2.1 Off network GSM-R REC when not registered to track access party 46 4.4.4.1.c XZ Off network infrastructure yards (PGD8) 51 4.5.3 Off network not leaving network by train leaving network reactionary 125 5y YT Off network REC GSM-R error from cab 46 4.4.4.1.f MU/TG/FC/TH/TZ Off network REC GSM-R error from cab preventing access to network 46 4.4.4.1.g MU OHLE ADD Electric traction, automatic dropper device 78 4.12.4.2.e M1 OHLE failure including bond or defect 74 4.12.1.11 I1 OHLE incident subject to formal enquiry 78 4.12.4.2.g

Subject Page Clause Specific Codes OHLE items on, miscellaneous other than vandalism 78 4.12.4.2.c I*/X* OHLE obstruction or tripping weather not originating of infrastructure XW OHLE obstruction unknown reason 74 4.12.1.11 I2 OHLE power reduction 78 4.12.4.2.d I4 OHLE switches,breakers,feeders,irregularities 74 4.12.1.11 I4 OHLE trip cause not known (OCB) 78 4.12.4.2.b I2 OHLE trips not pantograph unknown reason 74 4.12.1.11 I2 OHLE trips vegetation 74 4.12.1.11 JP OHLE vandalism 78 4.12.4.2.f XB Oil grease or substance on railhead source can not be identified 38 4.3.1.7.3.d OZ On network REC GSM-R error from cab by authorised person 46 4.4.4.1.d TG/FC/TH/TZ On network REC GSM-R error from cab by train maintenance staff 46 4.4.4.1.e MU On track equipment failure 116 5i IJ On track Machine (OTM) damaging infrastructure in a possession 117 5j J8 On track Machine (OTM) yellow plant 79 4.13.1 MV/I7/I5 On track plant (OTM) (yellow plant) fleet problem 43 4.4.1.3.e MV/I7/I5 Operating staff oversight, error or absence not signaller or control 119 5o OK Operational event safety reported in good faith (GSM-R) (REC) 46 4.4.4.1.a Operational GSM-R railway emergency call (REC) 45 4.4.4 Operational GSM-R system faults and failures.Flow chart 47 4.4.5.1 TG/FZ/J0/MD/M8/M9 Operator terminals or yards or none Network Rail operated.Off network 51 4.5.3 Origin late start not train crew 55 4.7.1 Other external causes responsibility of Network Rail 124 5x XZ Other forms of transport due to weather not meeting external criteria 90 4.14.5.2 I*/J*/M* Other freight operating company cause to be specified 114 5a AZ Other infrastructure cause 116 5i IZ Other passenger or external causes responsibility of TOC 123 5v VZ Other passenger train operating cause 122 5t TZ Other station operating causes 121 5r RZ OTMR train borne fault safety system within the cab passenger train 41 4.4.1.2.b M0 Over speed TPWS or train stop intervention against danger signal 49 4.4.6.1.a FC/TG Overcrowding an operators train cancelled or delayed 18 3.1.6 Overcrowding reactionary other services cancelled 125 5y YX Overcrowding reactionary short formed train 125 5y YQ Overhead power lines national grid,gas or water mains 124 5x XM Overloaded freight (not dangerous goods) 54 4.6.1.1 AG Overruns possession (4.13.2.5) 82 4.13.2.19 I5/QM Overruns possession defect found 83 4.13.2.19.o I*/J* Overruns track patrol 83 4.13.2.19.n I6 Overwhelmed asset weather 97 4.14.5.9 XT Pads and biscuits IS PANCHEX activations on passenger trains 41 4.4.1.2.a M1 PANCHEX no fault found Network Rail or wrong detection 112 4.15.3.5 IN Pandrol clip loose causing obstruction,points damage or short circuit IS Panel failure 116 5i IF Pantograph faults on passenger trains 41 4.4.1.2.a M1 Parcels vehicle delays 42 4.4.1.2.n ML Passenger accidental injury 108 4.15.1.3.h M*/R*/T*/V* Passenger assault 108 4.15.1.3.i VB Passenger charter excludable criteria due to weather (3.2.6) 90 4.14.5.1 V*/X* Passenger charter excludable events on LUL or non Network Rail lines 123 5v VW Passenger communication pulled 123 5v VH Passenger doors delays associated with faults on doors & associated 41 4.4.1.2.c M7 Subject Page Clause Specific Codes Passenger drop item signaller delays train to remove, not obstruction 66 4.11.2.ag OZ Passenger dropped object causing obstruction but not on or off train 66 4.11.2.af JX Passenger dropped object whilst boarding or alighting held by TOC 66 4.11.2.ae RP Passenger external other responsibility of TOC 123 5v VZ Passenger facilities failed technical faults above solebar on train 41 4.4.1.2.d M8 Passenger fallen between train and platform whilst boarding/alighting 66 4.11.2.ad RY/RZ Passenger injury non malicious 64 4.11.2.b VD Passenger joining or alighting special event 65 4.11.2.j R7 Passenger joining or alighting station overtime 64 4.11.2.i RB Passenger lost luggage 121 5r RU Passenger operator train driver 122 5t TG Passenger overcrowding (reactionary) including own late running 125 5y YX Passenger overcrowding (reactionary) short formed train 125 5y YQ Passenger overcrowding due to operators service cancelled or delayed 18 3.1.6 Passenger taken ill on a platform 121 5r RO Passenger taken ill on a train 123 5v VD Passenger train operating cause other causes 122 5t TZ Passing booked trains possessions (4.3.2.11) 83 4.13.2.19.k I5/I6/P* Patrolling including when published P code not utilised 83 4.13.2.19.i/j/l I6 Pending investigation holding codes (PGD7) 112 4.15.4 D* Personal needs break (PNB) train crew further delay 56 4.7.2.4 PIBS No fault found (train operator) 112 4.15.3.5 M* Placing objects deliberately on Network Rail infrastructure incl points 88 4.14.4.1.b XB Planned cancellation by train operator including bank holidays (3.28) 62 4.9.1.5 PE/PG Planned cancellation duplicate or erroneous schedule 120 5p PJ Planned cancellation not cancelled or engineering work (3.2.8) 62 4.9.1.5 PE/PG Planned cancellation through train planning system (TPS) 62 4.9.1.5/6 PD Planned engineering work/divert.SLW not timetable within ROR/EAS 120 5p PF Planned engineering work/divert.SLW not timetabled out of ROR/EAS 120 5q QB Planned P codes 20 3.2.8 Planned possession reactionary trains not retimed (4.13.2.2) 82 4.13.2.19.d QP Planned possessions 82 4.13.2.19 PF/QB Planned temporary speed restrictions (TSR) 77 4.12.2.4.a/b PA/JA Planned TSR (P coded) reaction to 82 4.13.2.19.c JB Planning error flow chart (schedules) 61 4.9.1.3 OQ/QA/QM/QN Planning issues including loco diagram or RT3973 not requested 115 5f FH Platform alteration actioned by CIS not updated 67 4.11.9 Platform alteration by signaller for given reason 67 4.11.7 Platform alteration requested to and actioned by signaller 67 4.11.8 Platform alteration varies from CIS, signaller passengers joining 67 4.11.6 OC Platform alteration varies from CIS, sufficient time. Passengers 67 4.11.6 Platform alterations actioned by ACI 67 4.11.10 OH/QA/QM Platform change,waiting platform,station congestion (reactionary) 125 5y YO Platform changes and alterations 67 4.11.6 Platform fatalities,injuries, being struck or fallen from train 123 5v VC Platform persons falling, jumping or dangling legs 89 4.14.4.1.m XA Platform structural problem which impeding the safe passage of trains 69 4.12.1.2.j JD Point failure caused by severe snow heaters working as designed 124 5x X9 Point heaters defective snow or frost causing points failure 116 5i IP Point heaters not fitted points failure 117 5j JT Point heaters severe snow points failed heaters working as designed. 124 5x X9 Point module failure IF Point trackside function module (TFM) failure IF

Subject Page Clause Specific Codes Points failure 116 5i IB Points failure caused by snow or frost where heaters not fitted 117 5j JT Points failure direct staff error JL Points failure snow or frost defective point heaters 116 5i IP Points obstruction confirmed vandalism XB Points obstruction including sand,coal,litter,ballast but not vandalism JX Points relay in location cabinet affecting points only IB Points telephones 73 4.12.1.7 IK Police searching the line 124 5x XF Police searching train not security 66 4.11.2.ab VG Poor brakes on passenger trains 42 4.4.1.2.h MN Poor ride quality (4.12.1.4) 110 4.15.2.4.a IS Poor ride quality no apparent cause 110 4.15.2.4.b IT Possession agreed TOC/NR not to retime or NR fails to retime 60 4.9.1.2.e QB Possession and infrastructure trains incidents 79 4.13 Possession infrastructure trains arriving or departing 81 4.13.2.14 I7 Possession on track machine (OTM) damage to infrastructure 117 5j J8 Possession on track machine (OTM) or engineering haulage. 79 4.13.1 MV/I7/I5 Possession overrun defect found 83 4.13.2.19.o I*/J* Possession overrun due to removal of staff from a worksite 83 4.13.2.19.q I5 Possession overrun due to substandard action of staff 83 4.13.2.19.r I5 Possession overrun substandard action signaller,LOM or MOM 83 4.13.2.19.p I5 Possession overrun track patrol 83 4.13.2.19.n I5 Possession overruns 80 4.13.2.5 I5 Possession passing booked trains 83 4.13.2.19.k I5/P* Possession planned (reaction) not retimed 82 4.13.2.19.d QP Possession with a single worksite 81 4.13.2.11 Possession with multiple worksites 81 4.13.2.12 Possession work not completed TSR/ESR 77 4.12.2.4.c JG Power distribution system functional supply points (FSP) 72 4.12.1.5b IH Power failure, signalling functional 116 5i IE Power reduction OHLE 78 4.12.4.2.d I4 Power supply failure at a station 65 4.11.2.s RZ Power supply failure at a station affecting mail or parcels 65 4.11.2.u AZ Power supply failure at a station external 65 4.11.2.t VZ Power supply failure external supplier 69 4.12.1.2.k XK Power supply failures 71 4.12.1.5 IA/IB/IC/IE/II/IH/XK/X4 Preparation of freight train waiting trains list 114 5a AC Preventative maintenance response remote condition monitoring alert 117 5j J9 Primary delay (PGD1) 15 2.7.2 Prime cause (PGD1) 15 2.7.1 Prime cause delay (PGD1) 18 3.1.4 Principal supply points (PSP) 72 4.12.1.5b IH Privately owned infrastructure off network 74 4.12.1.12 AX Provision of information 8 1.3 Provision of specified equipment locos and wagons freight operators 63 4.9.2.4 Provision of stock passenger operators 62 4.9.2.1 Public no fault found (NFF) Safety incident infrastructure 111 4.15.2.4.n J4 Radio failures legacy communications 73 4.12.1.8 I0 Rail defects 70 4.12.1.4 IR/IS/IT Railhead conditioning train (RHC) 40 4.3.2 OB/OE/OS/QA/QM/QN Railhead conditioning train (RHC) delays including reactionary 37 4.3.1.7.1.c OS Railhead conditioning train (RHC) failure 40 4.3.2.3.j OM Subject Page Clause Specific Codes Railhead conditioning train (RHC) long time in section other train delay 40 4.3.2.3.g OS Railhead conditioning train (RHC) none treatment 40 4.3.2.3.k Railhead conditioning train (RHC) schedule pathing 40 4.3.2.3.b-d QA/QM/QN Railhead conditioning train (RHC) train late start 40 4.3.2.3.h OS Railhead contamination of railhead after spillage from train 38 4.3.1.7.3.b M* Railhead examination failure to carry out after ERHC/LRA (4.3.1.6.1/2) 37 4.3.1.7.1.e QI Railhead manual treatment during autumn (4.3.2) 38 4.3.1.7.4 Railhead needs cleaning 38 4.3.1.7.3.a IZ Railhead oil, grease or substance source can not be identified 38 4.3.1.7.3.d OZ Railhead treatment not applied at planned locations (4.3.2) autumn 37 4.3.1.7.1.e QI Railhead treatment program failure to operate during autumn 37 4.3.1.7.1.a See 4.3.2 Railhead treatment the principles 38 4.3.1.7.5 Railhead water or Ice on running railhead (4.14.5) 38 4.3.1.7.3.c MP Rails in 4ft TCF clears when rail removed or crushed/damaged cables IS Rails in 4ft with immediate failure of track circuit JL Rails in 4ft with subsequent TCF failed when rail removed IC Railway emergency Call (REC) (GSM-R) 45 4.4.4 Re platforming or platform change 67 4.11.6 Reaction to planned possession not retimed 82 4.13.2.19.d QP Reaction to planned TSR 82 4.13.2.19.c JB Reactionary delay (PGD2/3) 15 2.7.3 Y* Reactionary delay additional guidelines (PGD2/3) 25 4.1.6.3 Y* Reactionary delay recovery time. Example 2 26 4.1.6.5 Y* Reactionary delay splitting two delays same effect. Example 1 24 4.1.6.1 Y* Reactionary delay splitting. Same value two or more incidents 25 4.1.6.5 Y* Reactionary to planned possessions 79 4.13.2.2 QP Reasonable time loss in section autumn minutes in excess of agreed 37 4.3.1.7.2.c FG/TW REC GSM-R error from cab by authorised person on network 46 4.4.4.1.d TG/FC/TH/TZ REC GSM-R error from cab by train maintenance staff on network 46 4.4.4.1.e MU REC GSM-R error from cab by unidentified person on network 46 4.4.4.1.d TG/FC/TH/TZ REC GSM-R error from cab off network 46 4.4.4.1.f MU/TG/FC/TH/TZ REC GSM-R error from cab off network by an unidentified person 46 4.4.4.1.g MU REC GSM-R error from cab off network preventing access to network 46 4.4.4.1.g MU REC GSM-R from cab by unauthorised person no operational event 46 4.4.4.1.h VA/RZ/FZ REC GSM-R initiated by Network Rail maintenance staff in error 46 4.4.4.1.j JL REC GSM-R initiated by signaller in error 46 4.4.4.1.i OC REC initiated by a none TAC party from off network (GSM-R) 46 4.4.4.1.c XZ REC operational event, safety reported in good faith. (GSM-R) 46 4.4.4.1.a REC unable to identify responsible part no technician report (GSM-R) 46 4.4.4.1.b J0 Recording of reliability events 10 2.4 RED alert declared by route controls EWAT initiated 90 4.14.5.1 V*/X* Reduction of speed due to weather 100 4.14.5.12 Refusing to pay ticket irregularities (TI) 65 4.11.2.z VE Regaining lost time subsequent delay 25 4.1.6.4 Registration failures GSM-R no technical or responsibility identified 48 4.4.5.2.m J0 Regulated following a train running less late (reactionary) 125 5y YC Regulated following another later running train (reactionary) 125 5y YD Regulated for another late running train-lost path (reactionary) 125 5y YB Regulated for train running less late-lost path (reactionary) 125 5y YA Regulated in accordance with regulation policy (reactionary) 125 5y YG Regulated to or from single line (reactionary) 125 5y YE Regulation and signalling of trains 57 4.8 OA/OB/OD/Y*/OQ Regulation ARS controlled areas 59 4.8.8

Subject Page Clause Specific Codes Regulation decision made with best endeavours 57 4.8 OA Regulation early running at request of driver or shunter signaller agreed 58 4.8.7.d OC Regulation early running control agreement 58 4.8.7.c OD Regulation early running error at point of delay 58 4.8.7.a OB Regulation early running not held at prior regulating point 58 4.8.7.b OC Regulation early running out of path result of a known incident 58 4.8.7.e Y* Regulation policy, regulated in accordance with (reactionary) 125 5y YG Reinstating planned cancellations not being permitted 62 4.9.1.6 PD Relay room 71 4.12.1.5 IA/IB/IC/IE/II/IH/XK/X4 Reliability events 8 1.4 Remote condition monitoring alert-preventative maintenance response 117 5j J9 Remote control failure 116 5i IF Renewal date exceeded temporary speed restriction (TSR) 77 4.12.2.4.f JS Repeat or indication circuit back to SB IF Reservation seating problems 64 4.11.2.c TF Responsible manager codes 12 2.6.4 RETB emergency telephones 73 4.12.1.7 IK RETB no fault found (train operator) 112 4.15.3.5 M9 RETB telecom equipment failure, legacy communications 73 4.12.1.8 I0 RETB terminal failure (4.15.3) 74 4.12.1.10 IL RETB train borne fault safety system within the cab (passenger) 41 4.4.1.2.b M0 Revisions to the delay attribution guide 9 1.6 Right away (RA)/close door (CD) defect 66 4.11.2.ah IA Right away (RA)/close door (CD) defect,operator mitigation not made 66 4.11.2.ai R1 Right away (RA)/close door (CD) sunlight on equipment 66 4.11.2.aj XU Right away (RA)/close door (CD) sunlight operator mitigation not made 66 4.11.2.ak R1 Road connections 121 5r/t RM/T3 Road related incidents damaging level crossing equipment 69 4.12.1.2.c XD Road related incidents not level crossing or bridge 69 4.12.1.2.e XN Road vehicles hitting bridges bridge Strike 87 4.14.2 XP Rolling contact fatigue (RCF) / GCC emergency speed restriction 77 4.12.2.4.m JS Rostering train crew problem 122 5t TI Rough ride (4.5.1.2.a) poor ride quality 110 4.15.2.4.a Rough ride no apparent cause 110 4.15.2.4.b IT Route knowledge lacking diverted not in contingency plan 64 4.10.1.b Route knowledge lacking diverted per pre arranged contingency plan 64 4.10.1.a FH/TI Routing incorrect driver not stopping and taking route 58 4.8.6 OC and TG/FP Routing incorrect on an agreed diversionary route 58 4.8.5 OC RT3185/7 forms signaller completion of when trains overlooked 111 4.15.2.5 OC RT3973 schedule ADL not taken into consideration 75 4.12.1.15.f QA/QM RT3973 schedule error timings requested by operator 60 4.9.1.2.f QA/QM RT3973 schedule timings not requested by operator 60 4.9.1.2.g TA/FH RT3973 waiting train preparation or completion of TOPS list 114 5a AC Running brake tests weather 100 4.14.5.12.e VW/MW S&C crossing defect IR Safety defect traction or stock 110 4.15.2.4.j M* Safety incident infrastructure categorically proven mistaken report 111 4.15.2.4.o J5 Safety incident Network Rail staff unable to find 111 4.15.2.4.m Safety incident operators staff unable to find 111 4.15.2.4.l FZ/M9/TZ Safety incidents and mishaps (4.15.4) 108 4.15.1 Safety problems reported by staff or public the principle. 110 4.15.2.2 Safety reported in good faith GSM-R REC 46 4.4.4.1.a Salt from road near level crossing 69 4.12.1.2.f XN Subject Page Clause Specific Codes Sanders faults on passenger trains 42 4.4.1.2.g MR Sandite train (RHC) 40 4.3.2.1 OB/OE/OS/QA/QM/QN Sandite vehicle break down train failure or problem 43 4.4.1.4.b OM Schedule ADL not taken into consideration 75 4.12.1.15.f QA/QM Schedule error flow chart planning 61 4.9.1.3 OQ/QA/QM/QN Schedule error on a WTT/LTP trains including simplifiers 60 4.9.1.2.a QA Schedule error RT3973 requested by operator 60 4.9.1.2.f QA/QM Schedule error RT3973 timings not requested by operator 60 4.9.1.2.g FH/TA Schedule error STP/VAR service including simplifiers 60 4.9.1.2.b QM Schedule error VSTP unvalidated timings used 60 4.9.1.2.c QN Schedule error VSTP where train is using validated WTT/STP times 60 4.9.1.2.d QA/QM Schedule not retimed for possession or NR/TOC agree not to retime 60 4.9.1.2.e QB Schedule STP in conjunction with a freight schedule 60 4.9.1.2.h QM Scrubbers faults on a passenger train 42 4.4.1.2.g MR Sea defences 69 4.12.1.2.i IV Searching train police not security 66 4.11.2.ac VG Seat reservation problems 64 4.11.2.c TF Seating broken technical faults above solebar on a passenger train 41 4.4.1.2.d M8 Security alert adjacent to Network Rail infrastructure 101 4.14.7.1.b XI Security alert affecting a station where trains can pass (PGD6) 101 4.14.7.1.c VI Security alert affecting a station where trains can stop (PGD6) 101 4.14.7.1.d VI Security alert affecting operators who do not stop at station 102 4.14.7.1.e XI Security alert flowchart 103 4.14.7.7 Security alert in fleet depot 102 4.14.7.1.g VI Security alert in freight depot off network 102 4.14.7.1.h M* Security alert joint responsibility 102 4.14.7.3 Security alert Network Rail managed stations (definition) (4.14.7.1) 102 4.14.7.6 Security alert non Network Rail not passenger trains 102 4.14.7.1.i AZ Security alert on a train 102 4.14.7.1.j VI/RZ/FZ Security alert stations affecting mail, parcels, charters 102 4.14.7.1.f AZ Selective door operation (SDO) no fault found (train operator) 112 4.15.3.5 M7 Semaphore signalling fog and falling snow regulations 92 4.14.5.4.p X1 Semaphore signals visibility due to weather (4.14.5.12.b) 92 4.14.5.4.aa X1 Senior conductor 122 5t TH Service recovery and contingency plans 64 4.10 Service recovery booked stock not available (reactionary) 125 5y YU Service recovery tactical cancellation not caused by late running 125 5y YR Severe cold weather affecting infrastructure responsibility of NR 124 5x XT Severe flooding obstructions on line, including trees 91 4.14.5.4.j X2 Severe heat affecting infrastructure NR responsibility not for speeds 124 5x XH Severe weather passenger charter excludable 90 4.14.5.1 V*/X* Severe weather passenger fleet depots 91 4.14.5.4.k VW Short formed train (reactionary) 125 5y YQ Shunter at a station 65 4.11.2.m RD Sighting issues per rule book TSR OZ 4.14.5.12.b- Sighting weather restrictions 100 d Signal box concentrator system (CON) 73 4.12.1.7 IK Signal box not open during booked hours 119 5o OL Signal box simplifier locally produced (4.9.1.3) 57 4.8.4 OQ/QA/QM Signal failure 116 5i IA Signal post telephone (SPT) 73 4.12.1.7 IK Signal trackside function moduel (TFM) module failure IF Signaller accidentally put signal to danger 110 4.15.2.4.d OC Subject Page Clause Specific Codes Signaller ADL is not included in box instructions 75 4.12.1.15.e I*/J* Signaller can mitigate ADL in box instructions 74 4.12.1.15.c OC Signaller completion of forms RT3185/7 trains overlooked 111 4.15.2.5 OC Signaller GSM-R registration failure entering wrong Rep No or TD berth 48 4.4.5.2.k OC Signaller put signal back to danger safety reason 110 4.15.2.4.e Signaller REC GSM-R initiated in error 46 4.4.4.1.i OC Signaller stops trains to recover item which is not obstruction 66 4.11.2.ag OZ Signaller unable to mitigate ADL box instructions 75 4.12.1.15.d I*/J* Signaller wrong ERTMS or ETCS instructions 119 5o OC Signaller wrong routing 57 4.8.5 OC Signalling and regulation of trains 57 4.8 OA/OB/OD/Y*/OQ Signalling anomaly 110 4.15.2.4.f IA Signalling functional power supply failure 116 5i IE Signalling lineside cable fault 116 5i II Signals obscured due to vegetation 37 4.3.1.7.1.b JP Signals or signs obscured by snow 92 4.14.5.4.z XT Signs defective or blown down 78 4.12.3 IQ Signs obscured due to vegetation 37 4.3.1.7.1.b JP Signs or signals obscured by snow 92 4.14.5.4.z XT Simplifiers locally produced not train Planning (4.8.3/4.9.1.3) 119 5o OQ Simplifiers signaller or station (4.9.1.3) 57 4.8.4 OQ/QA/QM Single worksite possessions 81 4.13.2.11 Slower vehicles stock swap or change 118 5m MS SLW engineering work planned not timetabled out of ROR/EAS 120 5q QB SLW planned engineering work not timetabled within ROR/EAS 120 5p PF SMART site or system failure automatic train reporting 31 4.2.5.1 OP Smoke fire from off network cautioning or stopping 107 4.14.8.8.2 XL Snow affecting infrastructure key route strategy (KRS) is in place. 91 4.14.5.4.n XT Snow affecting infrastructure key route strategy (KRS) not in place 91 4.14.5.4.m IW Snow flow chart weather 97 4.14.5.9 Snow obscuring signals or signs 92 4.14.5.4.z XT Snow or frost defective point heaters points failure 116 5i IP Snow or frost points failure heaters not fitted 117 5j JT Snow plough break down train failure or problem 43 4.4.1.4.b OM Snow several operating restrictions 100 4.14.5.12 Snow severe points failure heaters working as designed. 124 5x X9 Solid State Interlocking failure (SSI) 116 5i IF SPAD by a railhead conditioning train (RHC) (4.15.1.3.r-u) 40 4.3.2.3.j SPAD or station overshoot at ERHC published contamination site 37 4.3.1.7.2.b TG/FC SPAD Signal passed at danger infrastructure failure former Cat B 109 4.15.1.3.r I*/J* SPAD Signal passed at danger signaller error former Cat B 109 4.15.1.3.t OC SPAD Signal passed at danger train operator cause Cat A 109 4.15.1.3.s AZ/FC/FZ/M*/RY/TG/TH Special event passengers joining,alighting or station overtime 65 4.11.2.j R7 Special stop orders (SSO) 122 5t TP Special stop orders (SSO) unauthorised waiting issue 65 4.11.2.x RJ Special stop orders (SSO) waiting for authorisation 65 4.11.2.w RL Special stop orders within contingency/agreed NR/TOC (reactionary) 125 5y YM Special train. Royal or military 31 4.2.6 OZ Special working fog and falling snow regulations 92 4.14.5.4.p X1 Special working implemented for leaf fall track circuit operation 37 4.3.1.7.1.g QJ Speed reduction due to weather 100 4.14.5.12 Speed restrictions weather potential frozen brakes 100 4.14.5.12.a MW/VW Speedometer train borne fault safety system within the cab passenger 41 4.4.1.2.b M0 Subject Page Clause Specific Codes Sports event passengers joining or alighting special event 65 4.11.2.j R7 SSI interlocking failure IF SSI transmition system fault within telecoms network IK Staff error infrastructure 70 4.12.1.2.o JL Staff error Network Rail including criteria for not considering 75 4.12.1.17 JL Staff error Network Rail operations not signaller or control 119 5o OK Staff error possession overrun 83 4.13.2.19.p I5 Staff injury 109 4.15.1.3.j Staff shortage terminal or yard, off network 114 5a AD Staffing problems at station missing or uncovered 65 4.11.2.o R3 Standby supply equipment failure with external power supply 72 4.12.1.5b XK Standing water TOC/FOC directive not allowed to pass. 92 4.14.5.4.v MW/VW Star model diagram figure 1 17 3.1.3 Station buildings, weather affecting stopping trains 92 4.14.5.4.q VZ Station congestion,platform change or waiting platform (reactionary) 125 5y YO Station customer information system failures 65 4.11.2.r RV Station delay passenger overcrowded (reactionary) incl own lateness 125 5y YX Station evacuated due to fire alarm 121 5r RH Station flooding, including drain, not weather or from Network Rail 121 5r RW Station incidents. Flow chart 68 4.11.11 Station joint incidents 32 4.1.3.13 Station late TRTS given by station staff 65 4.11.2.p R2 Station mishap operating causes 121 5r RY Station operating delays use of codes 67 4.11.3 Station or SPAD overshoot at ERHC published contamination site 37 4.3.1.7.2.b FC/TG Station other operating causes 121 5r RZ Station overtime passengers joining or alighting. 64 4.11.2.i RB Station overtime short-formed train (reactionary) 125 5y YQ Station overtime special event 65 4.11.2.j R7 Station overtime unexplained 125 5z ZY Station passenger drop object whilst getting on/off train held by TOC 66 4.11.2.ae RP Station passenger dropped object causing obstruction not on/off train 66 4.11.2.af JX Station passenger failed between train and platform getting on/off train 66 4.11.2.ad RZ/RY Station power supply failure 65 4.11.2.s RZ Station power supply failure affecting mail or parcels 65 4.11.2.u AZ Station power supply failure external 65 4.11.2.t VZ Station signaller stops trains to recover item not an obstruction. 66 4.11.2.ag OZ Station staff error wrong anouncements mis-direction 121 5r R5 Station staff split responsibility unable to cover all duties 121 5r R4 Station staffing problems when missing or uncovered 65 4.11.2.o R3 Station unstaffed non DOO train 122 5t T2 Steam train locomotives on passenger trains 42 4.4.1.2.m ME Stock change or swap set change 118 5m MS Stock provision passenger operators 62 4.9.2.1 Stock service recovery booked stock not available (reactionary) 125 5y YU Stretcher defect PW hand points from SB or GF IB Striking overhead branches or vegetation not due to weather 37 4.3.1.7.1.b JP Structural problem with platforms impeding the safe passage of trains 69 4.12.1.2.j JD Structures problem on bridges, tunnels, viaducts and buildings 69 4.12.1.2.g JD Sub threshold delays cumulative or succession (4.2.4) 25 4.1.6.2 Subsidence 69 4.12.1.2.i IV Suicides including stuck by a train (PGD6) 87 4.14.3.2 XC/VC/AZ/FZ Sun on right away (RA) /close Door(CD) 66 4.11.2.aj XU Subject Page Clause Specific Codes Sun on right away (RA) /close Door(CD) operator mitigation not made 66 4.11.2.ak R1 Sun on signal aspect (4.14.5.4.o) 98 4.14.5.10 IZ/XU Sun on signaller panel 98 4.14.5.10 OZ Sun on the cab windscreen (4.14.5.4.ab) 98 4.14.5.10 M*/FG/FZ/TG//TW Sun on train dispatch equipment (4.11.2.aj/ak) 98 4.14.5.10 VZ/AZ/IZ/XU Sun shining onto cab where driver not taken preventative action 92 4.14.5.4.ab TG/FZ Sun shinning on signal aspect driver unable to clearly see aspect 92 4.14.5.4.o XU Sun visibility flow chart (4.14.5.4) 98 4.14.5.10 Supplies loading including catering 122 5t T4 Surge voltage external power supply 72 4.12.1.5b XK Suspect package on Network Rail infrastructure 101 4.14.7.1.a XI Suspect package on train 102 4.14.7.1.j FZ/RZ/VI Swing bridge failure 69 4.12.1.2.h JD Swing bridge open for river of canal traffic 124 5x XQ Switch creep IS Switches failed SO53 test IR T piece missing (IBJ / IRJ rail joint) IC T2 and T12 possessions 80 4.13.2.9 I6 Tactical cancel for service recovery not caused by own late running 125 5y YR Tail cable fault IC Tail cable fault between Loc and equipment IB Tail lamp out or showing wrongly 110 4.15.2.4.k FM/TJ Tail light train borne fault safety system within the cab passenger train 41 4.4.1.2.b M0 Take back no substantive delay reason 120 5q QT TASS balise activated train borne systems on passenger trains 42 4.4.1.2.k NA TASS balise trackside infrastructure failure 44 4.4.2.1.b IM TASS no fault found (4.15.3) 44 4.4.3.2 TASS no fault found (train operator) 112 4.15.3.5 NA TASS on board system fails 44 4.4.2.1.a NA TCA train borne safety system faults on passenger trains 42 4.4.1.2.f MT TDM Time division multiplex failure 116 5i IF Technical faults above solebar on passenger trains 41 4.4.1.2.d M8 Technical faults below solebar on passenger trains 41 4.4.1.2.e MD Technical faults below solebar on passenger trains 41 4.4.1.2.e MD Technical head train borne fault safety system within the cab 41 4.4.1.2.b M0 Telecommunication links with signalling equipment TDM/SSI/TD/BLO 73 4.12.1.6 IK Telecoms equipment failure, transmission sys & cable failure 73 4.12.1.7 IK Telecoms equipment failures, legacy NRN/CSR/RETB link 116 5i I0 Telecoms incoming supply FTN/GSM-R 72 4.12.1.5b XK Telecoms radio failures IVRS 73 4.12.1.9 J0 Telephones concentrator,SPT,LC,RETB,GF,Pts,line side 73 4.12.1.7 IK Temperature or wind blanket speed restrictions 91 4.14.5.4.f X4 Temporary speed restriction (TSR) condition of bridge (COB) 77 4.12.2.4.g/h PB/JD Temporary speed restriction (TSR) condition of Earthworks 77 4.12.2.4.i/j PB/IV Temporary speed restriction (TSR) condition of track (COT) 77 4.12.2.4.d/e JS/PB Temporary speed restriction (TSR) including emergency (ESR) 76 4.12.2 Temporary speed restriction (TSR) indicators defective or down 78 4.12.3 IQ Temporary speed restriction (TSR) outside Rules of route (ROR/EAS) 117 5j JA Temporary speed restriction (TSR) work not completed 77 4.12.2.4.c JG Terminal congestion off network 114 5a AE Terminal waiting traffic including documentation 114 5a AJ Terminal yard staff shortage off network 114 5a AD Theft at a station 65 4.11.2.y VA Subject Page Clause Specific Codes Theft infrastructure but not cables 88 4.14.4.1.b XB Theft infrastructure on non Network Rail infrastructure 89 4.14.4.1.d VB/AZ Theft of cable 88 4.14.4.1.a XR Theft unexplained train coming to halt 89 4.14.4.2 Third rail failure or defect 74 4.12.1.11 I1 Third rail obstruction reason unknown 74 4.12.1.11 I2 Third rail shoe beam faults passenger trains 41 4.4.1.2.a M1 Third rail switches,breakers,feeders and irregularities 74 4.12.1.11 I4 Third rail trips vegetation 74 4.12.1.11 JP Threat of trespass from station or footbridge 89 4.14.4.1.l XA Ticket irregularities (TI) 65 4.11.2.z VE Tilting trains TASS / balise 44 4.4.2.1 NA/IM Time loss reasonable level of. Neutral zone during autumn 32 4.3.1.4.2 Timetable and resource planning errors 60 4.9 QA/QM/FH/TA Toilet doors delays associated with faults on doors & associated 41 4.4.1.2.c M7 Toilet technical faults above solebar on passenger trains 41 4.4.1.2.d M8 Token equipment failure 116 5i IL TOPS train list waiting or completion of list 114 5a AC TPS schedule cancellation 62 4.9.1.5/6 PD TPWS driver adhering to company professional driving standards 49 4.4.6.1.b TW/TG TPWS fault protecting signal at red including lineside equipment 49 4.4.6.3 IJ TPWS intervention of failure 49 4.4.6 FC/TG/FG/TW/MT/IJ TPWS no fault found train operator (4.4.6.1.c) 112 4.15.3.5 M* TPWS on track equipment failure 70 4.12.1.2.l IJ TPWS on track equipment incorrectly installed or positioned 49 4.4.6.1.d IJ TPWS on train safety system failure 49 4.4.6.1.c MT TPWS over speed or train stop intervention against danger signal 49 4.4.6.1.a TG/FC TPWS train borne safety system faults on passenger trains 42 4.4.1.2.f MT TPWS train stop sensor (TSS) intervention against proceed aspect 49 4.4.6.1.e IJ Track circuit failure (TCF) 116 5i IC Track defect not a rail defects. Fish plates, wet bed etc 116 5i IS Track defects 70 4.12.1.4 IR/IS/IT Track out of gauge IS Track patrolling 83 4.13.2.19.i/j/l I6 Track side function module (TFM) failure IF Trackside signs including TSR/ESR board defective or down 78 4.12.3 IQ Traction motors technical faults below solebar on train (passenger) 41 4.4.1.2.e MD Traction power supply failure principal supply point (PSP) 72 4.12.1.5b IH Traffic waiting customer including documentation 114 5a AJ Train based equipment failed-multiple infrastructure based equipment 111 4.15.3.2 F*/N*/M*/T* Train based equipment list or responsibilities 112 4.15.3.5 Train based equipment two or more trains on track equipment faults 111 4.15.3.2 IN Train borne equipment no fault found (train operator) 111 4.15.3.3 F*/N*/M*/T* Train borne safety system faults (passenger trains) 42 4.4.1.2.f MT Train borne systems no fault found (4.15.3) freight trains 43 4.4.1.3.d M9 Train borne systems no fault found (4.15.3) passenger trains 42 4.4.1.2.l M9 Train crew booked not available service recovery (reactionary) 125 5y YN Train crew booking on duty including between turns 55 4.7.2.1/2 FE/TG/TH Train crew on duty travelling passenger on a late running service 56 4.7.2.3.c YJ Train crew personal needs break (PNB) further delay 56 4.7.2.4 Train crew stepping up significant lateness 56 4.7.2.3.b YN Train crew travelling passenger planned cancellation.2200 hrs+ start 56 4.7.2.3.d FH / TI Train crew travelling passenger planned cancellation.Pre 2200 hrs start 56 4.7.2.3.e

Subject Page Clause Specific Codes Train crew waiting 55 4.7.2 FE/TG/TH/YJ/YN Train crew working late inward services on the same turn of duty 56 4.7.2.3.a YJ Train describer, panel, ARS, SSI failure 116 5i IF Train dispatch equipment failure, Network Rail but not telecoms 117 5j J2 Train diverted or re-routed at FOC request (freight) 115 5f FK Train held at FOC request freight services 115 5f FJ Train manager,conductor,senior conductor or guard 122 5t TH Train operating company directive 122 5t TR Train operator mishap 122 5t TY Train operators request cancelled or delayed passenger services 122 5t TB Train plan 10 2.2 Train preparation, train list 114 5a AC Train stop failure 116 5i IJ Train stop intervention or over speed TPWS 49 4.4.6.1.a TG/FC Train striking smaller birds the same size or smaller than a pheasant 84 4.14.1.6 V8 Train time reports 10 2.3 Trains incurring several small delays (4.8) 28 4.2.4 Treadle failure at level crossings 116 5i ID Trees encroaching NR infrastructure not weather or vandalism 124 5x XO Trees falling from outside railway boundaries not weather or vandalism 124 5x XO Trees on line due to wind 91 4.14.5.4.i XW Trees on line obstruction or safety 110 4.15.2.4.g JX Trespass on Network Rail exit from a train without permission 89 4.14.4.1.h VA Trespass on Network Rail from freight trains ex Network Rail 89 4.14.4.1.k XA Trespass on Network Rail from freight trains ex terminals/yards 89 4.14.4.1.j AZ Trespass on Network Rail infrastructure not from a trains 89 4.14.4.1.g XA Trespass on non Network Rail infrastructure 89 4.14.4.1.d AZ/VB Trespass threat of from station or footbridge 89 4.14.4.1.l XA Trespass unexplained train coming to halt 89 4.14.4.2 Trip AC/DC. OHLE/3rd rail when cause not known 78 4.12.4.2.b I2 Trip cock train stop failure 116 5i IJ Trolley catering problems 64 4.11.2.d TK TRTS failure not registered, activation by dispatch staff demonstrated. 75 4.12.1.16 J2 TRTS late train ready to start by station staff 65 4.11.2.p R2 TRUST delay codes (section 5) 12 2.6.3 TRUST outages or failure preventing recording and investigation 31 4.2.5 OP TRUST train running system TOPS 10 2.1.2 TSI created by Network Rail schedule error (VSTP) 60 4.9 QN Tunnels structural problems 69 4.12.1.2.g JD Twisted rail 116 5i IR Twisted sleeper or timber IS Unattributed cancellations 125 5z ZW Unauthorised person GSM-R REC from cab no operational event 46 4.4.4.1.h VA/RZ/FZ Unexplained believed to be down to freight operator 28 4.2.2 FO Unexplained believed to be down to operator passenger trains 28 4.2.2 TO Unexplained delays succession (4.2.4) 25 4.1.6.2 Unexplained late start 125 5z ZX Unexplained loss in running 29 4.2.4 ZZ Unexplained station overtime 125 5z ZY Unexplained train coming to halt vandalism,theft or trespass 89 4.14.4.2 Uninterruptable power supply (UPS) 72 4.12.1.5a IH Un-investigated delays 119 5o OU Union directive causing un-planned delays. 109 4.15.1.3.w

Subject Page Clause Specific Codes Unknown cause bumps 116 5i IT Unknown minutes delay not apparently due to Network Rail (4.2.4) 28 4.2.2 TO/FO Unknown train incurring several small delays (4.8) 29 4.2.4.3 ZZ Unstaffed station non DOO train 122 5t T2 Updating TRUST incidents 14 2.6.18 Vagrants at a station 65 4.11.2.y VA Vandalism GSM-R cab based equipment 48 4.4.5.2.h VA/FZ Vandalism GSM-R infrastructure or signal centre based equipment 48 4.4.5.2.i XB Vandalism infrastructure but not cables 88 4.14.4.1.b XB Vandalism of cable 88 4.14.4.1.a XR Vandalism OHLE 78 4.12.4.2.f XB Vandalism on non Network Rail infrastructure 89 4.14.4.1.d VB/AZ Vandalism unexplained train coming to halt 89 4.14.4.2 VCB technical faults above solebar on passenger trains 41 4.4.1.2.d M8 Vegetation withine NR boundary obscured signs,signals or striking 37 4.3.1.7.1.b JP Viaducts structural problems 69 4.12.1.2.g JD Visibility caused by fog, snow or rain 99 4.14.5.11 X1/XT/VR/FG/TW Visibility sun flow chart (4.14.5.4) 98 4.14.5.10 Voltage surge external power supply 72 4.12.1.5b XK VSTP cross boundary delays 13 2.6.16 QN VSTP management if freight services during disruption cancellation 62 4.9.1.7 VSTP minor delays less than 5 mins and not reactionary 62 4.9.1.4 PN VSTP schedule error on Network Rail TSI created schedule 60 4.9 QN Wagons on a freight train fault 43 4.4.1.3.c ML Waiting acceptance possessions 81 4.13.2.14 I7 Waiting acceptance to network yard or terminal due to late running 53 4.5.4.2.c/d Y* Waiting acceptance yard/Siding off network freight terminals or yards 50 4.5.2.1 Waiting connections authorised by TOC but outside policy 64 4.11.2.g TM/RK Waiting connections not authorised 64 4.11.2.h RI Waiting connections within policy (FOC) 64 4.11.2.f YL/OW Waiting connections within policy (none FOC) 64 4.11.2.e YL Waiting customer traffic including documentation 114 5a AJ Waiting platform,station congestion or platform change (reactionary) 125 5y YO Waiting to or from single line (reactionary) 125 5y YE Waiting to pass booked trains possessions 81 4.13.2.16 I6 Waiting train crew 55 4.7.2 FE/TG/TH/YJ/YN Waiting train preparation or completion of TOPS list/RT3973 114 5a AC Warning board for TSR/ESR defective or down 78 4.12.3 IQ Water mains,gas or overhead power lines (national grid) 124 5x XM Water or ice on running railhead (4.14.5.9) 38 4.3.1.7.3.c MP Water standing TOC/FOC directive not allowed to pass 92 4.14.5.4.v VW/MW Waterborne or road vehicles Bridge strike 87 4.14.2 XP Watering train at station 65 4.11.2.m RD Weather additional running brake tests 100 4.14.5.12.e VW/MW Weather adherence to company driving standards and polices freight 92 4.14.5.4.ac FG Weather adherence to company driving standards and polices pass 92 4.14.5.4.y VR Weather affecting most modes of transport passenger train delays 43 4.4.1.4.a VW Weather asset overwhelmed 97 4.14.5.9 XT Weather below line speed restrictions potential frozen brakes 100 4.14.5.12.a MW/VW Weather delays associated with the effect of weather on the train 42 4.4.1.2.j MW Weather economic mitigation 90 4.14.5.1 V*/X* Weather effects no reasonable or viable economic mitigation 90 4.14.5.1 V*/X* Weather fleet restriction from snow or ice 100 4.14.5.12.f VW/MW Subject Page Clause Specific Codes Weather impact on non Network Rail passenger lines 92 4.14.5.4.w VZ Weather infrastructure failure equipment outside design 91 4.14.5.4.b X* Weather infrastructure failure equipment within design 91 4.14.5.4.a I*/J* Weather Network Rail speed restriction to protect infrastructure 100 4.14.5.12.g Weather non severe fleet depots 91 4.14.5.4.c MU Weather non severe fleet problems 91 4.14.5.4.d MW Weather non severe snow,ice,frost affecting infrastructure equipment 116 5i IW Weather other forms of transport not meeting external criteria 90 4.14.5.2 I*/J*/M* Weather reduction in speed due to difficulty sighting signals 100 4.14.5.12.b TW/VR/FG Weather reduction in speed sighting of structures,stations or boards 100 4.14.5.12.c TW/VR/FG Weather reduction in speed sighting snow obscuring assets 100 4.14.5.12.d XW Weather semaphore signals visibility (4.14.5.12.b) 92 4.14.5.4.aa X1 Weather several operating restrictions 100 4.14.5.12 Weather severe fleet problems 91 4.14.5.4.l VW Weather severe passenger charter excludable 90 4.14.5.1 V*/X* Weather severe snow points failure heaters working as designed 124 5x X9 Weather snow obscuring signals or signs 92 4.14.5.4.z XT Weather station buildings affecting stopping trains 92 4.14.5.4.q VZ Weave engineering work planned not timetabled out of ROR/EAS 120 5q QB Weave planned engineering work not timetabled within ROR/EAS 120 5p PF Weed killer break down train failure or problem 43 4.4.1.4.b OM Wet bed track defect 116 5i IS Wheel scrubbers faults on a passenger trains 42 4.4.1.2.g MR WHEELCHEX no fault found Network Rail or wrong detection. 112 4.15.3.5 IN WILD No fault found Network Rail or wrong detection 112 4.15.3.5 IN WILD train borne safety system faults on apassenger train 42 4.4.1.2.f MT Wind flow chart weather 94 4.14.5.6 Wind obstructions on line including trees 91 4.14.5.4.i XW Wind or temperature blanket speed restrictions per group standards 91 4.14.5.4.f X4 Wind screen wipers weather delays associated with the train 42 4.4.1.2.j MW Wind wires down or damage to OHLE 91 4.14.5.4.e XW Windows faults technical faults above solebar on train but not external 41 4.4.1.2.d M8 Wires down and other OHLE problems 78 4.12.4 Wires down due to high winds 78 4.12.4.2.a XW Wires down or damage to OHLE due to wind 91 4.14.5.4.e XW Worksites (possessions) 81 4.13.2.12 Wrong announcements, station staff 121 5r R5 Wrong detection HABD PANCHEX WILD WHEELCHEX PanMon 112 4.15.3.5 IN Wrong routing signaller including agreed diversionary route.2 incidents 58 4.8.5 OC WSP brake and Brake system faults including wheel flats on a train 42 4.4.1.2.h MN Yard congestion off network 114 5a AE Yard equipment breakdown or reduced capacity, off network 114 5a AH Yard staff shortage off network 114 5a AD Yard waiting customer traffic including documentation 114 5a AJ Yellow plant on track machine (OTM) 79 4.13.1 MV/I7/I5

(Index and Glossary kindly compiled by Chris Scharf) DAG Glossary. ABS Air brake system OTM On track machine (Yellow plant) A CI Automatic code insertion (ARS) OTMR On train monitoring recorder A DD Automatic dropper device (pantograph) PA NCHEX Pantograph checking system. PanMon A DL Accepted design limitations PGD Process and Guidance Document A DRC Access dispute resolution committee PIBS Platform indicator beacon system A RS Automatic route setting PIS Passenger information system (CIS) ATP Automatic train protection PNB Personal need break. AWA Autumn w orking arrangements PPM Public performance measure AWS Automatic w arning system PRM Persons w ith reduced mobility BTP British transport police PSB Pow er signal box CaSL Cancellations and significant lateness RCF Rolling contact fatigue (GCC) C-DA S Connected driver advisory system RCM Remote condition monitoring CIS Customer information system (PIS) REC Railw ay emergency call COA Change of aspect (signals) RETB Radio electronic token block COT Condition of track RHC Railhead conditioning CRT Critical rail temperature ROC Rail operating centre CSR Cab secure radio ROP Rules of the plan.Timetable planning rules DA Delay attribution ROR Rules of the route,now know n as EAS DA B Delay attribution board RRV Road Rail Vehicle DA G Delay attribution guide SB Signal box DMU Diesel multiple unit SCC Signalling control centre DOO Driver only operation SDO Selective door operation. DSD Drivers safety device SDR Simplified direct reporting DV D Drivers Vigilance Device SLW Single line w orking DV T Driving van trailer SMA RT Signal monitoring and reporting to TRUST EA S Engineering access statement (ROR) SPA D Signal passed at danger. EWA T Extreme w eather action team SPT Signal post telephone ECR Electrical control room STA NOX Station number used in TOPS EMU Electric multiple unit SSI Solid state interlocking ERHC Exceptional railhead conditions SSO Special stop order ERTMS European rail traffic management system STP Short term planning schedule ESR Emergency speed restriction T&RS Traction and rolling stock ETCS European train control system TAC Track access contract FDM Freight delivery measure TASS Tilt authorisation and speed supervision FMS Fault management system TCA Track circuit actuator FOC Freight operating company TD train describer GCC Gauge corner cracking (RCF) TDA TRUST delay attribution GSM- R Global system mobile telecoms railw ays TDM Time division multiplex GZAM Green zone access manager TIN TRUST incident number HA BD Hot axle box detector TIPLOC Train planning location HST High speed train TIS Traction interlock sw itch IBJ Insulated block joint or rail joint (IRJ) TOC Train operating company IDA NR Internal delay attribution guidance TOPS Total operations processing system IECC Integrated electronic control centre TPS Train planning system IV RS Interactive voice radio system TPWS Train protection w arning system LC Level crossing TRTS Train ready to start LRA Low rail adhesion TRUST Train running system: TOPS LOM Local operations manager (NR position) TSI Train service information LTP Long term planning (WTT) schedule TSR Temporary speed restriction LUL London underground TTP Timetable processor (ARS) MFSDD Management of freight services during - VAR Variation schedule MPV Multi purpose vehicle - disruption V CB Vacuum circuit breaker MOM Mobile Operations manager (NR position) VSTP Very short term planning schedule NFF No fault found WHEELCHEX Wheel checking system NR Netw ork Rail WILD Wheel impact load detector NRN National radio netw ork WON Weekly operating notice OCB Open or oil circuit breaker WSP Wheel slide protection OHLE Overhead line equipment (25 KV AC) WTT Working timetable (LTP) schedule