UNC Modification Register

Joint Office of Gas Transporters http://www.gasgovernance.com/Code/Modifications/

UNC Modification Register *Key Dates are normally an end-date, where shown red this is date sent to Ofgem Modification Reference Suffix: A - Alternate, S - Self Governance, FT - Fast Track Self Governance, V - Varied

Mod Proposing Date Live/ Text Text Modification Title Category Workgroup Current Status Next Stage Key date* Legal Text Provider Text Requested Text Due Std Met ACS Ref Organisation Raised Closed Rotation Delivered

Amendment to Gas Quality NTS Entry SAGE North Sea Allocated to 0780 S Specification at the St Fergus SAGE System 11-Aug-21 Live Self-Governance Transmission Report to Panel 16-Dec-21 National Grid Limited Workgroup Entry Point

Allocated to 0779 Introduction of Entry Capacity Assignments National Grid NTS 10-Aug-21 Live Modification Transmission Report to Panel 17-Feb-22 N/A - National Grid Workgroup

Allocated to 0778 R Gas Vacant Sites Process review Centrica 09-Aug-21 Live Request Distribution Report to Panel 18-Aug-22 N/A - Request Workgroup

Pavilion Energy Allocated to 0777 Removal of Obstacles to Market Withdrawal 09-Aug-21 Live Modification Transmission Report to Panel 18-Nov-21 National Grid Spain Workgroup

Revision of the Modification Panel Meeting Allocated to 0776 S National Grid NTS 09-Jul-21 Live Self-Governance Governance Report to Panel 21-Oct-21 N/A - National Grid Location Requirement in the Modification Rules Workgroup

Amendment to the Requirement to Conduct the Allocated to 0775 S National Grid NTS 05-Jul-21 Live Self-Governance Transmission Report to Panel 16-Sep-21 N/A - National Grid Transporting Britain’s Energy Consultation Workgroup

Alignment of UNC TPD to the National Grid Representations 0774 S National Grid NTS 05-Jul-21 Live Self-Governance Governance Consultation end 03-Sep-21 N/A - National Grid 19/08/2021 10/09/2021 19/08/2021 Y Licence in respect of the NTS invited

Introduction of a Micro Business identifier in 0773 Gazprom Energy 05-Jul-21 Closed Modification Distribution Withdrawn End of process 12-Jul-21 Cadent 2 Central Systems

Transparency Improvements to the Process for Allocated to 0772 S Changing Gas Quality Limits in NTS National Grid NTS 09-Jun-21 Live Self-Governance Transmission Report to Panel 16-Sep-21 N/A - National Grid n/a Workgroup Connection Agreements

Removal of the absolute requirement to include Allocated to 0771 S a Remotely Operable Valve (ROV) Installation National Grid NTS 08-Jun-21 Live Self-Governance Transmission Report to Panel 21-Oct-21 N/A - National Grid n/a Workgroup for all new NTS Entry connections

Amendments to legal text numbering for UNC Northern Gas 0770 FT 04-Jun-21 Closed Fast Track None Implemented Effective date 09-Jul-21 Northern Gas Networks Modification 0701 Networks

Adding Local Authorities as a new User type to Representations No Text req'd - 0769 S Cadent 01-Jun-21 Live Self-Governance Distribution Consultation end 13-Sep-21 Cadent n/a the Data Permissions Matrix invited enabling Mod

SCR - text Retail Code Consolidation Significant Code Significant Code 0768 Ofgem 13-May-21 Closed Other Implemented Effective date 01-Sep-21 Cadent provided with Review Review mod

Incorporation of AUGE Framework Document Allocated to 0767 Gazprom Energy 12-May-21 Live Modification Distribution Report to Panel 18-Nov-21 Scotia Gas Networks 1 into the UNC main body Workgroup

Align TPD Section Y (Part A-I) to the National 0766 FT National Grid NTS 07-Apr-21 Closed Fast Track NTS CMF Implemented Effective date 11-May-21 N/A - National Grid Grid Licence in respect of the NTS

New retrospective debit and credit charges to reflect changes to the treatment of Entry Representations 0765 National Grid NTS 07-Apr-21 Live Modification NTS CMF Consultation end 20-Sep-21 N/A - National Grid 19/08/2021 10/09/2021 19/08/2021 Y Capacity Revenue between October and invited December 2020

UNC TPD Section Y (Part A-I) amendments to 0764 National Grid NTS 06-Apr-21 Closed Urgent NTS CMF Implemented Effective date 24-May-21 N/A - National Grid Kt to align to RIIO2 Licence

Allocated to 0763 R Review of Gas Meter By-Pass Arrangements Scottish Power 29-Mar-21 Live Request Distribution Report to Panel 21-Oct-21 N/A - Request n/a Workgroup

Adding the Retail Energy Code Company as a 0762 S SGN 12-Mar-21 Closed Self-Governance Distribution Implemented Effective date 12-Jul-21 Scotia Gas Networks n/a new User type to the Data Permissions Matrix

Arrangements for Interconnectors with Allocated to 0761 National Grid NTS 10-Mar-21 Live Modification Transmission Report to Panel 21-Oct-21 N/A - National Grid n/a additional Storage capability Workgroup

Introducing the concept of a derogation Northern Gas Representations 0760 09-Mar-21 Live Modification Governance Consultation end 20-Sep-21 Northern Gas Networks n/a 19/08/2021 10/09/2021 18/08/2021 Y framework into Uniform Network Code (UNC) Networks invited

Enhancements to NTS Within-Day Firm Entry 0759 S National Grid NTS 08-Mar-21 Closed Self-Governance Transmission Implemented Effective date TBC N/A - National Grid n/a 15/04/2021 07/05/2021 and Exit Capacity Allocations

Temporary extension of AUG Statement Utilita Energy 0758 04-Mar-21 Closed Modification Distribution Rejected End of process 06-Sep-21 Cadent 8 15/04/2021 07/05/2021 creation process Limited

Amendment to Ratchet Process Guidance 0757 FT SGN 12-Feb-21 Closed Fast Track None Implemented Effective date 11-May-21 Scotia Gas Networks n/a Document Name

Changes to Offtake Profile Notice Submission Panel requested 0756 S National Grid NTS 11-Feb-21 Closed Self-Governance Transmission Implemented Effective date 14-Jun-21 N/A - National Grid n/a 12/04/2021 01/04/2021 Y Requirements text 18/03/21

Panel requested 0755 S Enhancement of Exit Capacity Assignments National Grid NTS 08-Feb-21 Closed Self-Governance Transmission Implemented Effective date TBC N/A - National Grid n/a text 21/05/21

Investigate Advanced Analytic Options to Allocated to 0754 R Gazprom Energy 05-Feb-21 Live Request Other Report to Panel 18-Nov-21 N/A - Request n/a improve NDM Demand Modelling Workgroup

Removal of Pricing Disincentives for Secondary Panel did not Total Gas and Panel requested 0753 Trading of Fixed Price NTS System Entry 29-Jan-21 Live Modification NTS CMF recommend Ofgem decision 17-Jun-21 N/A - National Grid n/a 12/04/2021 12/02/2021 Y Power text 18/03/21 Capacity implementation

South Hook Gas Panel requested 0752 S Introduction of Weekly Entry Capacity Auction 11-Jan-21 Closed Self-Governance Transmission Implemented Effective date TBC N/A - National Grid n/a 12/04/2021 15/04/2021 Company Ltd text 18/03/21

Panel did not Panel requested 0751 Capping price increases for Long-Term Entry Storengy UK Ltd 11-Jan-21 Live Modification NTS CMF recommend Ofgem decision 17-Jun-21 N/A - National Grid n/a 12/04/2021 13/04/2021 text 18/03/21 Capacity implementation

FT - text Amendment to regulations relating to Covid Northern Gas 0750 FT 14-Dec-20 Closed Fast Track None Implemented Effective date 13-Jan-21 Northern Gas Networks n/a provided with Modifications Networks mod

Allocated to 0749 R Increased DM SOQ Flexibility Barrow Shipping Ltd 11-Dec-20 Live Request Other Report to Panel 21-Oct-21 N/A - Request n/a Workgroup

Prospective Removal of Entry Capacity 0748 Revenue from Capacity Neutrality National Grid NTS 08-Dec-20 Closed Urgent NTS CMF Implemented Effective date 01-Jan-21 N/A - National Grid n/a Arrangements

Amendment of reference from AIGT to INA 0747 FT GTC Pipelines Ltd 03-Dec-20 Closed Fast Track None Implemented Effective date 13-Jan-21 Wales & West Utilities 7 within the UNC

Application of Clarificatory change Panel did not Panel requested 0746 to the AQ amendment process Gazprom Energy 19-Nov-20 Live Modification Distribution recommend Ofgem decision 15-Jul-21 Cadent text 21/05/21 within TPD G2.3 from 1st April 2020 implementation

Panel requested 0745 S Mandatory Setting of Auction Bid Parameters National Grid NTS 12-Nov-20 Closed Self-Governance Transmission Implemented Effective date tbc N/A - National Grid n/a 11/02/2021 text 21/01/21

Remove redundant reference to NTS Optional 0744 FT National Grid NTS 06-Nov-20 Closed Fast Track None Implemented Effective date 11-Dec-20 N/A - National Grid n/a Commodity Charges

Panel requested 0743 S Revisions to User Termination Provisions National Grid NTS 06-Nov-20 Closed Self-Governance Transmission Implemented Effective date 12-Mar-21 N/A - National Grid n/a 11/02/2021 text 21/01/21

Amendment to Gas Quality NTS Entry SAGE North Sea 0742 Specification at the St Fergus SAGE System 06-Nov-20 Closed Modification Transmission Withdrawn End of process 19-Feb-21 N/A - National Grid n/a Limited Entry Point

Updating specific gender references to neutral 0741 S E.ON UK 23-Oct-20 Closed Self-Governance Governance Implemented Effective date 14-Jun-21 Cadent 6 18/02/2021 11/03/2021 09/02/2021 Y terms

0740 - Amending the Formula Year AQ 0740 E.ON UK 09-Oct-20 Closed Modification none Withdrawn End of process 14-Oct-20 approach for 2021/2 Formula Year

Aggregate overrun regime for Original Capacity Panel requested 0739 ENI 05-Oct-20 Closed Modification Transmission Rejected End of process 20-Aug-21 N/A - National Grid n/a 12/01/2021 04/01/2021 held at the Bacton ASEPs text 17/12/20

Panel requested 0738 Incremental NTS Entry Capacity Surrender Barrow Shipping Ltd 05-Oct-20 Closed Modification Transmission Rejected End of process 19-Mar-21 N/A - National Grid n/a Text 19/11/2020

Panel did not Transfer of NTS Entry Capacity from a Panel requested 0737 Centrica 09-Sep-20 Live Modification NTS CMF recommend Ofgem decision 21-Jan-21 N/A - National Grid n/a Capacity Abandoned ASEP Text 19/11/2020 implementation

Clarificatory change to the AQ amendment 0736 A process within TPD G2.3 (Renumbered as Gazprom Energy 15-Sep-20 Closed Modification Distribution Withdrawn End of process 19-Nov-20 Cadent n/a 0746)

Panel Clarificatory change to the AQ amendment 0736 S Cadent 07-Sep-20 Closed Self-Governance Distribution Implemented Effective date 14-Jan-21 Cadent n/a Requested Text 05/11/2020 process within TPD G2.3 15/10/2020

UNC Changes as a consequence of the United 0735 VS National Grid NTS 21-Jan-21 Closed Self-Governance None Implemented Effective date 12-Mar-21 N/A - National Grid Kingdom’s exit from the European Union

UNC Changes as a consequence of the Distribution absence of trade agreement/s between the 0735 S National Grid NTS 04-Sep-20 Closed Self-Governance and Withdrawn End of process 21-Jan-21 N/A - National Grid n/a United Kingdom and the European Union (‘no Transmission deal’)

Reporting Valid Confirmed Theft of Gas into Allocated to 0734 S Central Systems and Reporting Suspected Gazprom Energy 12-Aug-20 Live Self-Governance Distribution Report to Panel 18-Nov-21 Scotia Gas Networks 5 Workgroup Theft to Suppliers

FT - text UNC Section Y clarification post decision on 0733 FT National Grid NTS 10-Aug-20 Closed Fast Track None Implemented Effective date 01-Oct-20 N/A - National Grid n/a provided with implementation of Modification 0678A mod

FT - text Performance Assurance Committee voting Wales & West 0732 FT 07-Aug-20 Closed Fast Track None Implemented Effective date 14-Sep-20 Wales & West Utilites n/a provided with arrangements Utilities mod

Panel Introduction of an Annual Modification Panel 0731 S Gazprom Energy 06-Aug-20 Closed Self-Governance Governance Implemented Effective date 13-Jan-21 Cadent 4 Requested Text 05/11/2020 Report 15/10/2020

0730 V COVID-19 Capacity Retention Process Gazprom Energy 17-Dec-20 Closed Modification Distribution Rejected End of process 19-Mar-21 Northern Gas Networks 3

0730 COVID-19 Capacity Retention Process Gazprom Energy 30-Jun-20 Closed Modification Distribution Withdrawn End of process 17-Dec-20 Northern Gas Networks 02/07/2020

Panel Applying a discount to the Revenue Recovery 0729 Storengy UK Ltd 24-Jun-20 Closed Modification NTS CMF Implemented Effective date 01-Oct-21 National Grid NTS n/a Requested Text 19/08/2020 19/08/2020 Y Charge at Storage Points 19/08/2020

Introduction of Conditional Discounts for 0728 D ENI 09-Jun-20 Closed Urgent NTS CMF Rejected End of process 27-Apr-21 National Grid NTS n/a Avoiding Inefficient Bypass of the NTS

Introduction of a Capacity Discount to Avoid 0728 C RWE Npower 09-Jun-20 Closed Urgent NTS CMF Rejected End of process 27-Apr-21 National Grid NTS n/a Inefficient Bypass of the NTS

Introduction of Conditional Discount for 0728 B Avoiding Inefficient Bypass of the NTS with Vitol SA Geneva 09-Jun-20 Closed Urgent NTS CMF Implemented Effective date 01-Oct-21 National Grid NTS n/a 28km distance cap

Introduction of Conditional Discounts for South Hook Gas 0728 A 09-Jun-20 Closed Urgent NTS CMF Rejected End of process 27-Apr-21 National Grid NTS n/a Avoiding Inefficient Bypass of the NTS Company Ltd

Introduction of a Conditional Discount for 0728 National Grid NTS 09-Jun-20 Closed Urgent NTS CMF Rejected End of process 27-Apr-21 National Grid NTS n/a Avoiding Inefficient Bypass of the NTS

Increasing the Storage Transmission Capacity 0727 Storengy UK 05-Jun-20 Closed Urgent NTS CMF Implemented Effective date 01-Oct-21 National Grid NTS n/a Charge Discount to 80%

Wales & West 0726 COVID-19 Liquidity Relief Scheme for Shippers 03-Jun-20 Closed Urgent Distribution Implemented Effective date 24-Jun-20 Northern Gas Networks n/a Utilities

Ability to Reflect the Correct Customer Network 0725 Use and System Offtake Quantity (SOQ) Gazprom Energy 05-May-20 Closed Urgent Other Rejected End of process 29-May-20 Northern Gas Networks n/a During COVID-19

Amendment to Ratchet charges during COVID- Northern Gas 0724 21-Apr-20 Closed Urgent Distribution Implemented Effective date 12-May-20 Northern Gas Networks n/a 19 period Networks

Use of the Isolation Flag to identify sites with Northern Gas 0723 abnormal load reduction during COVID-19 21-Apr-20 Closed Urgent Distribution Implemented Effective date 12-May-20 Northern Gas Networks n/a Networks period

Allow Users to submit Estimated Meter 0722 Gazprom Energy 21-Apr-20 Closed Urgent Distribution Implemented Effective date 12-May-20 Northern Gas Networks n/a Reading during COVID-19

Shipper submitted AQ Corrections during 0721 Gazprom Energy 21-Apr-20 Closed Urgent Distribution Rejected End of process 02-Jun-20 Northern Gas Networks n/a COVID-19

Amendments to the Agreed Target Quantity at N/A - Enabling 0720 S National Grid 11-Mar-20 Closed Self-Governance Transmission Implemented Effective date 09-Oct-20 n/a the Moffat Interconnection Point Modification

0719 R Calculation of Energy Value of Gas SGN 06-Mar-20 Closed Request Offtake Request Closed End of process 17-Sep-20 National Grid NTS n/a

Introduction of Conditional Capacity Discount 0718 C RWE 06-Mar-20 Closed Modification NTS CMF Withdrawn End of process 26-Mar-20 National Grid NTS n/a for Avoiding Inefficient Bypass of the NTS

Introduction of Conditional Discounts for VPI Immingham 0718 B Avoiding Inefficient Bypass of the NTS with 06-Mar-20 Closed Modification NTS CMF Withdrawn End of process 26-Mar-20 National Grid NTS n/a LLP 28km Distance Cap

Introduction of Conditional Discounts for 0718 A South Hook Gas 06-Mar-20 Closed Modification NTS CMF Withdrawn End of process 26-Mar-20 National Grid NTS n/a Avoiding Inefficient Bypass of the NTS

Introduction of a Conditional Discount for 0718 National Grid 06-Mar-20 Closed Modification NTS CMF Withdrawn End of process 26-Mar-20 National Grid NTS n/a Avoiding Inefficient Bypass of the NTS

Increasing the Storage Transmission Capacity 0717 Storengy UK 05-Mar-20 Closed Modification NTS CMF Withdrawn End of process 26-Mar-20 na na Charge Discount to 80%

Panel 0716 A Revision of Overrun Charge Multiplier Storengy UK 20-Apr-20 Closed Modification Transmission Rejected End of process 18-Sep-20 N/A - National Grid n/a Requested Text 09/07/2020 19/06/2020

Panel 0716 Revision of Overrun Charge Multiplier National Grid 12-Feb-20 Closed Modification Transmission Implemented Effective date 01-Oct-20 N/A - National Grid n/a Requested Text 09/07/2020 19/06/2020

Amendment of the Data Permission Matrix and 0715 S UNC TPD Section V5 to add Electricity System National Grid 10-Feb-20 Closed Self-Governance Distribution Implemented Effective date 15-Jun-20 n/a n/a Operator (ESO) as a new User type

Amendment to Network Entry Provision at 0714 Centrica 08-Jan-20 Closed Modification Other Implemented Effective date 29-Mar-21 n/a n/a Perenco Bacton terminal

Panel Amendments to TPD V3.1.7 Independent Wales & West Transmission 0713 S 12-Dec-19 Closed Self-Governance Implemented Effective date 11-May-20 Wales & West Utilities n/a Requested Text 14/01/2020 Assessment table Utilities & Distribution 19/12/2019

Amending the oxygen content limit in the OMV Gas Marketing 0712 S Network Entry Agreement (NEA) at the St 20-Nov-19 Closed Self-Governance Transmission Implemented Effective date 11-May-20 n/a and Trading GmbH Fergus SAGE plant

Panel 0711 Update of AUG Table to reflect new EUC bands Gazprom 11-Nov-19 Closed Modification Distribution Implemented Effective date 01-Oct-21 Northern Gas Networks 3 Requested Text 06/02/2020 28/01/2020 Y 16/01/20

CDSP provision of Class 1 read Wales & West 0710 S 08-Nov-19 Closed Self-Governance Distribution Implemented Effective date tbc Wales & West Utilites n/a service Utilities

Amendment of references to Data Protection Wales & West 0709 FT 08-Nov-19 Closed Fast Track None Implemented Effective date 12-Dec-19 Wales & West Utilites n/a 07/11/2019 Act for GDPR Utilities

Re-ordering of the UNC in advance of Faster Northern Gas 0708 S 08-Nov-19 Closed Self-Governance Governance Implemented Effective date tbc Northern Gas Networks n/a Switching Networks

Introducing ‘Performance Assurance No Text req'd - 0707 S Framework Administrator’ as a new User type Shell 08-Nov-19 Closed Self-Governance Distribution Implemented Effective date 14-Apr-20 n/a n/a enabling Mod to the Data Permissions Matrix

Instances where Shippers can exit commercial Contract Natural 0706 R 31-Oct-19 Closed Request Distribution Withdrawn End of process 25-Feb-20 n/a n/a agreements with an independent Supplier Gas Ltd

Allocated to 0705 R NTS Capacity Access Review National Grid NTS 10-Oct-19 Live Request Transmission Report to Panel 21-Oct-21 n/a n/a Workgroup

0704 S Review of Transporter Theft Reporting SGN 04-Oct-19 Closed Self-Governance Distribution Implemented Effective date 15-Jun-20 SGN n/a

Correction to Modification 0689S Text provided 0703 S 'Improvements to Margins Notice National Grid NTS 04-Oct-19 Closed Self-Governance Transmission Implemented Effective date 25-Nov-19 National Grid NTS n/a with mod Arrangements'

Introducing ‘Research Body’ as a new User 0702 S type to the Data Permissions Matrix and UNC Gazprom Energy 11-Sep-19 Closed Self-Governance Distribution Implemented Effective date tbc Cadent 2 TPD Section V5

Aligning Capacity booking under the UNC and Northern Gas 0701 01-Aug-19 Closed Modification Distribution Implemented Effective date TBC Northern Gas Networks n/a arrangements set out in relevant NExAs Networks

0700 Enabling large scale utilisation of Class 3 Gazprom Energy 19-Jul-19 Closed Urgent Distribution Implemented Effective date 28-Sep-19 Cadent 2

Incentivise Key Areas of Performance using 0699 Scottish Power 10-Jul-19 Closed Modification Distribution Withdrawn End of process 21-Jan-20 Scotia Gas Networks 1 additional UIG Charges

Text provided 0698 S Improvements to Margins Notice Arrangements National Grid NTS 09-Jul-19 Closed Self-Governance Transmission Implemented Effective date 09-Sep-19 National Grid NTS n/a 18/07/2019 18/07/2019 Y with mod

Panel Alignment of the UNC TPD Section V5 and the 0697 VS Gazprom Energy 17-Sep-20 Closed Self-Governance Distribution Implemented Effective date 18-Nov-20 Cadent 8 Requested Text 17/09/2020 17/09/2020 Y Data Permissions Matrix 17/09/2020

Panel Alignment of the UNC TPD Section V5 and the 0697 S Gazprom Energy 08-Jul-19 Closed Self-Governance Distribution Withdrawn End of process 17-Sep-20 Cadent 8 Requested Text 19/08/2020 19/08/2020 Y Data Permissions Matrix 19/08/2020

Aligning Capacity booking under the UNC and Northern Gas 0696 A arrangements set out in relevant NExAs 01-Aug-19 Closed Modification Distribution Withdrawn End of process 15-Aug-19 Wales & West Utilities 7 Networks (Renumbered to 0701)

Addressing inequities between Capacity Panel Panel 0696 V booking under the UNC and arrangements set Gazprom Energy 19-Mar-20 Live Modification Distribution recommended Ofgem decision 21-May-20 Wales & West Utilities 7 Requested Text 09/04/2020 19/03/2020 Y out in relevant NExAs implementation 19/03/2020

Addressing inequities between Capacity Panel 0696 booking under the UNC and arrangements set Gazprom Energy 12-Jun-19 Closed Modification Distribution Withdrawn End of process 19-Mar-20 Wales & West Utilities 7 Requested Text 06-Sep-19 06/09/2019 Y out in relevant NExAs 15/08/2019

Obligations on Shippers to pass Transporter Northern Gas Text provided 0695 S compensation payments on to consumers, via 10-Jun-19 Closed Self-Governance Distribution Implemented Effective date 08-Nov-19 Northern Gas Networks n/a 17/09/2019 17/09/2019 Y Networks with mod Suppliers

Wales & West 0694 R CDSP provision of Class 1 Read service 31-May-19 Closed Request Distribution Withdrawn End of process 25-Nov-19 n/a Utilities

Treatment of kWh error arising from statutory 0693 R Scottish Power 23-May-19 Closed Request Distribution Request Closed End of process 21-Jan-21 n/a volume-energy conversion

Total Gas and Text provided 0692 S Automatic updates to Meter Read Frequency 02-May-19 Closed Self-Governance Distribution Implemented Effective date tbc Cadent 6 Power with mod

Panel CDSP to convert Class 2, 3 or 4 meter points to 0691 S Centrica 09-Apr-19 Closed Self-Governance Distribution Implemented Effective date tbc Scotia Gas Networks 5 Requested Text 12/03/2020 12/03/2020 Y Class 1 when G1.6.15 criteria are met 20/02/2020

Panel 0690 S Reduce qualifying period for Class 1 Centrica 09-Apr-19 Closed Self-Governance UIG Implemented Effective date 25-Mar-20 Cadent 4 Requested Text 12/12/2019 21/11/2019

Removing the requirement to support Invoice 0689 queries before the due date with information Gazprom 09-Apr-19 Closed Modification Distribution Withdrawn End of process 13-Sep-19 Northern Gas Networks 3 from the .AML file

Recovery of Shipper Losses incurred in Contract Natural 0688 09-Apr-19 Closed Modification Transmission Withdrawn End of process 02-Oct-19 Cadent 2 Supplier of Last Resort events Gas Ltd

Panel Panel Creation of new charge to recover Last Resort Total Gas and 0687 09-Apr-19 Live Modification Distribution recommended Ofgem decision 17-Oct-19 Scotia Gas Networks 1 Requested Text 06/09/2019 19/08/2019 Y Supply Payments Power implementation 15/08/2019

Panel Removal of the NTS Optional Commodity Rate Vermilion Energy 0686 02-Apr-19 Closed Modification NTS CMF Rejected End of process 18-Jun-21 National Grid NTS n/a Requested Text 14/05/2019 15/05/2019 N with adequate notice Ireland Ltd 18/4/19

Panel Amendment of the UNC term ‘Gas Deficit 0685 National Grid NTS 02-Apr-19 Closed Modification None Implemented Effective date 01-Oct-19 National Grid NTS n/a Requested Text 14/05/2019 29/04/2019 Y Warning’ to ‘Gas Balancing Notification’ 18/04/19

Amendment of the Data Permission Panel 0684 S Matrix to add Meter Asset Provider as a new Scottish Power 14-Mar-19 Closed Self-Governance Distribution Implemented Effective date 28-Jun-19 Cadent 8 Requested Text 11/04/2019 27/03/2019 Y User type Document - Phase 1 21/03/19

Offtake Arrangements Document (OAD) 0683 S Cadent 11-Mar-19 Closed Self-Governance Offtake Implemented Effective date 15-Jun-20 Cadent n/a Review Updates – Phase 1

Panel Market Participant MDD Migration to UNC 0682 E.ON UK 08-Mar-19 Closed Modification Distribution Implemented Effective date 28-Feb-20 Wales & West Utilities 7 Requested Text 14/05/2019 20/05/2019 N Governance from the SPAA 18/4/19

Panel Improvements to the quality of the Conversion 0681 S E.ON UK 06-Mar-19 Closed Self-Governance UIG Implemented Effective date 25-Mar-20 Cadent 6 Requested Text 07/06/2019 04/06/2019 Y Factor values held on the Supply Point Register 16/05/19

Panel UNC Changes as a Consequence of ‘no deal’ 0680 VS National Grid NTS 01-Nov-19 Closed Self-Governance Transmission Withdrawn End of process 18-Feb-20 National Grid NTS Requested Text 14/03/2019 United Kingdom Exit from the European Union 21/02/19

Panel UNC Changes as a Consequence of ‘no deal’ 0680 S National Grid NTS 07-Feb-19 Closed Self-Governance Transmission Withdrawn End of process 01-Nov-19 National Grid NTS Requested Text 14/03/2019 United Kingdom Exit from the European Union 21/02/19

Amendments to Gas Transmission Charging 0679 Regime (Postage Stamp) (Renumbered to RWE Npower 24-Jan-19 Closed Urgent Other Withdrawn End of process 28-Jan-19 National Grid NTS 0678A)

Amendments to Gas Charging Regime South Hook Gas 0678 J (Postage Stamp) including a Cost based 19-Mar-19 Closed Urgent Other Rejected End of process 28-May-20 National Grid NTS Company Ltd Optional Capacity Charge

Amendments to Gas Transmission Charging 0678 I Gazprom 27-Feb-19 Closed Urgent Other Rejected End of process 28-May-20 National Grid NTS Regime

Amendments to Gas Transmission Charging 0678 H Regime (Postage Stamp) including a Cost EP UK Investments 27-Feb-19 Closed Urgent Other Rejected End of process 28-May-20 National Grid NTS based Optional Capacity Charge

Amendments to Gas Transmission Charging 0678 G Regime including a Cost based Optional Vitol SA Geneva 26-Feb-19 Closed Urgent Other Rejected End of process 28-May-20 National Grid NTS Capacity Charge

Amendments to Gas Transmission Charging 0678 F Regime – Treatment of Unprotected Entry Storengy UK Limited 22-Feb-19 Closed Urgent Other Rejected End of process 28-May-20 National Grid NTS Capacity and Storage

Amendments to Gas Charging Regime – Gateway LNG 0678 E 20-Feb-19 Closed Urgent Other Rejected End of process 28-May-20 National Grid NTS Treatment of Storage Company Ltd

Amendments to Gas Transmission Charging 0678 D ENI 20-Feb-19 Closed Urgent Other Rejected End of process 28-May-20 National Grid NTS Regime

Amendments to Gas Charging Regime 0678 C SSE 15-Feb-19 Closed Urgent Other Rejected End of process 28-May-20 National Grid NTS (Postage Stamp)

Amendments to Gas Transmission Charging 0678 B Centrica 06-Feb-19 Closed Urgent Other Rejected End of process 28-May-20 National Grid NTS Regime

Amendments to Gas Transmission Charging 0678 A RWE 28-Jan-19 Closed Urgent Other Implemented Effective date 01-Oct-20 National Grid NTS Regime (Postage Stamp)

Amendments to Gas Transmission Charging 0678 National Grid NTS 17-Jan-19 Closed Urgent Other Rejected End of process 28-May-20 National Grid NTS Regime

0677 R Shipper Supplier Theft Reporting Request first:utility 04-Jan-19 Closed Request Other Request Closed End of process 21-Nov-19 n/a

Review of Gas Transporter Joint Office 0676 R Gazprom 24-Dec-18 Closed Request Governance Withdrawn End of process 22-Feb-21 SGN 5 Arrangements

Enabling changes to the BBL Interconnection No Text req'd - 0675 S National Grid NTS 11-Dec-18 Closed Self-Governance Transmission Implemented Effective date 12-Jul-19 National Grid NTS Agreement to facilitate physical reverse flow enabling Mod

Performance Assurance Techniques and Allocated to Panel requested 0674 Scottish Power 07-Nov-18 Live Modification Other Report to Panel 16-Dec-21 Cadent 4 11/02/2021 Controls Workgroup text 21/01/21

Amendment of UNC and DSC arrangements to 0673 enable Xoserve to bid for and provide CSS Gazprom 19-Oct-18 Closed Urgent Other Implemented Effective date 30-Nov-18 Northern Gas Networks 3 Services

Panel Target, Measure and Reporting Product Class 4 0672 S Scottish Power 08-Oct-18 Closed Self-Governance UIG Implemented Effective date 07-Sep-20 Cadent 2 Requested Text 12/12/2019 06/12/2019 Y Read Performance 21/11/19

New Capacity Exchange process at NTS exit Wales & West 0671 08-Oct-18 Closed Modification Transmission Withdrawn End of process 16-Aug-19 n/a points for capacity below baseline Utilities

Review of the charging methodology to avoid No Text req'd - 0670 R National Grid NTS 08-Oct-18 Closed Request NTS CMF Request Closed End of process 16-Jul-20 National Grid NTS the inefficient bypass of the NTS Request

Review of the Gas Deficit Warning (GDW) and 0669 R National Grid NTS 07-Sep-18 Closed Request Transmission Request Closed End of process 15-Aug-19 National Grid NTS Margins Notice (MN) Arrangements

Amendment of the Data Permission Matrix to 0668 S E.ON UK 06-Sep-18 Closed Self-Governance Distribution Implemented Effective date 01-Mar-19 Scotia Gas Networks 1 19/12/2018 N add Alt Han Company as a new User type

Panel Inclusion and Amendment of Entry Incremental South Hook Gas 0667 06-Sep-18 Closed Modification Transmission Rejected End of process 20-Feb-20 National Grid NTS Requested Text 11/04/2019 16/04/2019 N Capacity Release NPV test in UNC Company Ltd 21/03/19

Establishment of a CSS Bid Group or CDSP Text provided 0666 Gazprom 15-Aug-18 Closed Urgent Other Implemented Effective date 11-Sep-18 Cadent 8 29/08/2018 29/08/2018 Y central switching system bid activities with mod

Panel 0665 Changes to Ratchet Regime Gazprom 14-Aug-18 Closed Modification Other Implemented Effective date 01-Oct-19 SGN 7 (5) Requested Text 14/03/2019 21/02/19

Transfer of Sites with Low Read Submission Panel 0664 VVS Performance from Class 2 and 3 into Class 4 SSE 17-Jun-21 Closed Self-Governance Distribution Implemented Effective date TBC Cadent 6 Requested Text 17/09/2020 17/09/2020 Y (adopted) 17/09/20

Transfer of Sites with Low Read Submission Panel 0664 V Performance from Class 2 and 3 into Class 4 SSE 17-Sep-20 Closed Modification Distribution Withdrawn End of process 17-Jun-21 Cadent 6 Requested Text 17/09/2020 17/09/2020 Y (adopted) 17/09/20

Transfer of Sites with Low Read Submission Panel 0664 Performance from Class 2 and 3 into Class 4 SSE 28-Jun-19 Closed Modification UIG Withdrawn End of process 17-Sep-20 Cadent 6 Requested Text 06/02/2020 29/01/2020 Y (adopted) 16/01/20

Transfer of Sites with Low Read Submission 0664 Npower 06-Aug-18 Closed Modification UIG Withdrawn End of process 26-Jun-19 Cadent 6 Performance from Class 2 and 3 into Class 4

Extending the data comprised under the 0663 S definition of Supply Point Premises Data (TPD Scottish Power 06-Jul-18 Closed Self-Governance Distribution Withdrawn End of process 27-Nov-18 Wales & West Utilities 5 (7) V5.18.1)

0662 Revenue Recovery at Combined ASEPs National Grid NTS 12-Jun-18 Closed Modification Transmission Withdrawn End of process 09-Jan-20 National Grid

0661 R Reconciliation and Imbalance Cash Out Prices Winchester Gas 11-Jun-18 Closed Request Other Request Closed End of process 16-May-19 n/a n/a

Panel Amendment to PARR permissions to allow 0660 S Centrica 08-Jun-18 Closed Self-Governance Distribution Implemented Effective date 07-Dec-18 Cadent 4 Requested Text 11/10/2018 PAC to update with UNCC approval 20/09/18

Improvements to the Composite Weather Panel requested 0659 S E.ON UK 29-May-18 Closed Self-Governance UIG Withdrawn End of process 14-Nov-18 Northern Gas Networks 3 08/11/2018 Variable Text 18/10/18

CDSP to identify and develop improvements to Total Gas and 0658 25-May-18 Closed Urgent None Implemented Effective date 06-Jul-18 Cadent 2 LDZ settlement processes Power

Adding AQ reporting to the PARR Schedule 0657 S Npower 30-Apr-18 Closed Self-Governance Distribution Implemented Effective date 12-Oct-18 SGN 1 N/A reporting suite

Panel 0656 Changes to Modification Panel arrangements Gazprom 30-Apr-18 Closed Modification Governance Implemented Effective date 28-Nov-18 Cadent 8 Requested Text 07/09/2018 17/08/2018 Y 16/08/18

Requiring a Meter Reading following a change 0655 S Gazprom 06-Apr-18 Closed Self-Governance Distribution Withdrawn End of process 16-Jul-18 Wales & West Utilities 7 of Local Distribution Zone or Exit Zone.

Panel requested 0654 S Mandating the provision of NDM sample data E.ON UK 28-Mar-18 Closed Self-Governance UIG Implemented Effective date 01-Mar-19 Scotia Gas Networks 5 16/08/2018 16/08/2018 Y Text 16/08/18

Updating the parameters for the NTS Optional 0653 Commodity Charge – Introducing the NTS Centrica 15-Mar-18 Closed Modification NTS CMF Withdrawn End of process 13-Aug-18 National Grid NTS n/a Optional Capacity Charge

Introduction of winter read/consumption reports Panel requested 0652 Npower 07-Mar-18 Closed Modification UIG Implemented Effective date tbd Northern Gas Networks 3 08/11/2018 16/11/2018 N and associated obligations Text 18/10/18

Changes to the Retrospective Data Update Panel requested 0651 Cadent 05-Mar-18 Closed Modification Distribution Implemented Effective date tbd n/a n/a 18/07/2018 18/07/2018 Y provisions Text 18/07/18

Minor Typographical Correction to UNC0638V Northern Gas 0650 FT 28-Feb-18 Closed Fast Track Distribution Implemented Effective date 10-Apr-18 n/a Legal Text Networks

Panel Update to UNC to formalise the Data Enquiry 0649 S Gazprom 26-Feb-18 Closed Self-Governance Distribution Implemented Effective date 09-Nov-18 Cadent 2 Requested Text 07/09/2018 17/08/2018 Y Service Permissions Matrix 16/08/18

Panel End dating the revised DM Read estimation 0648 S Gazprom 06-Feb-18 Closed Self-Governance Distribution Implemented Effective date 11-Jun-18 Scotia Gas Networks 1 Requested Text 08/03/2018 26/02/2018 Y process introduced by Modification 0634 15/02/18

Wales & West 0647 Opening Class 1 reads to Competition 18-Jan-18 Closed Modification Distribution Withdrawn End of process 20-Jun-19 n/a Utilities

Allocated to 0646 R Review of the Offtake Arrangements Document Cadent 10-Jan-18 Live Request Oftake Report to Panel 21-Oct-21 n/a Workgroup

Panel Amending the oxygen content limit in the 0645 S South Hook Gas Ltd 02-Jan-18 Closed Self-Governance Transmission Implemented Effective date 11-Jun-18 National Grid NTS Requested Text 08/03/2018 16/02/2018 Y Network Entry Agreement at South Hook LNG 15/02/18

Improvements to nomination and reconciliation 0644 through the introduction of new EUC bands and E.ON UK 15-Dec-17 Closed Modification Distribution Withdrawn End of process 27-Jul-18 Cadent 2 (6) improvements for the ALP and DAF

(Urgent) - Changes to settlement regime to 0643 address Unidentified Gas issues including Orsted Sales 15-Dec-17 Closed Urgent Distribution Rejected End of process 17-Aug-18 Cadent 2 (4) retrospective correction

Panel (Urgent) - Changes to settlement regime to 0642 A E.ON UK 22-Dec-17 Closed Urgent UIG Rejected End of process 17-Aug-18 Cadent 2 Requested 08/02/2018 01/02/2018 Y address Unidentified Gas issues 18/01/18

(Urgent) - Changes to settlement regime to 0642 Corona Energy 15-Dec-17 Closed Urgent Distribution Rejected End of process 17-Aug-18 Cadent 2 address Unidentified Gas issues

Amendments to Modification 0431 - Panel 0641 S Shipper/Transporter - Meter Point Portfolio Centrica 08-Dec-17 Closed Self-Governance Distribution Implemented Effective date 11-Jun-18 Cadent 8 Requested 08/02/2018 07/03/2018 N Reconciliation rules and obligations 18/01/18

Panel Provision of access to Domestic Consumer 0640 S Centrica 08-Dec-17 Closed Self-Governance Distribution Implemented Effective date 10-Apr-18 Wales & West Utilities 7 Requested Text 17/01/2018 17/01/2018 Y data for Suppliers 21/12/17

Review of AUGE Framework and 0639 R Gazprom 07-Dec-17 Closed Request Individual Request Closed End of process 21-Jun-18 n/a n/a Arrangements

Panel Mandate monthly read submission for Smart 0638 V Centrica Energy 21-Dec-17 Closed Modification Distribution Implemented Effective date 01-Apr-18 Northern Gas Networks 3 Requested Text 16/01/2018 08/01/2018 Y and AMR sites from 01 April 2018 21/12/17

Panel Mandate monthly read submission for Smart 0638 Centrica Energy 30-Oct-17 Closed Modification Distribution Withdrawn End of process 21-Dec-17 Northern Gas Networks 3 Requested Text 09/11/2017 07/11/2017 Y and AMR sites from 01 April 2018 19/10/17

Panel Amending the permissions to release data to 0637 S E.ON UK 11-Oct-17 Closed Self-Governance Distribution Implemented Effective date 08-Dec-17 Cadent 6 Requested Text 19/10/2017 19/10/2017 Y Meter Asset Provider organisations 19/10/17

Updating the parameters for the NTS Optional 0636 D Commodity Charge while complying with the Gazprom 06-Apr-18 Closed Modification NTS CMF Rejected End of process 31-Jul-18 National Grid NTS n/a EU Tariff Code Updating the parameters for the NTS Optional Commodity Charge – Introducing the NTS 0636 C* Centrica 20-Feb-18 Closed Modification NTS CMF Withdrawn End of process 13-Aug-18 National Grid NTS n/a Optional Capacity Charge (Renumbered to 0653) Panel Updating the parameters for the NTS Optional 0636 C Aughinish Alumina 02-Mar-18 Closed Modification NTS CMF Rejected End of process 31-Jul-18 National Grid NTS n/a Requested Text 09/04/2018 03/04/2018 Y Commodity Charge 15/03/18

Panel Updating the parameters for the NTS Optional 0636 B SSE 01-Feb-18 Closed Modification NTS CMF Rejected End of process 31-Jul-18 National Grid NTS n/a Requested Text 08/03/2018 03/04/2018 N Commodity Charge 15/02/18

Panel Updating the parameters for the NTS Optional 0636 A Vitol S.A. Geneva 05-Jan-18 Closed Modification NTS CMF Rejected End of process 31-Jul-18 National Grid NTS n/a Requested 08/02/2018 03/04/2018 N Commodity Charge 18/01/18

Panel Updating the parameters for the NTS Optional Vermilion Energy 0636 10-Oct-17 Closed Modification NTS CMF Rejected End of process 31-Jul-18 National Grid NTS n/a Requested Text 16/01/2018 03/04/2018 N Commodity Charge Ireland Ltd 21/12/17

Reforms to incentivise accurate and timely DM Wales & West 0635 A reads and to remove the Transporter Class 1 10-Jan-18 Closed Modification Distribution Renumbered End of process 18-Jan-18 SGN 5 Utilities read obligation

Reforms to incentivise accurate and timely DM 0635 reads for Class 2 Meter Points to improve the first:utility 09-Oct-17 Closed Modification Distribution Withdrawn End of process 20-Feb-18 SGN 5 accuracy of Unidentified Gas allocation

Panel (Urgent) - Revised estimation process for DM 0634 first:utility 09-Oct-17 Closed Urgent Distribution Implemented Effective date 20-Nov-17 Cadent 4 Requested Text 09/11/2017 07/11/2017 Y sites with D-7 zero consumption 19/10/17

Panel Mandate monthly read submission for Smart 0633 V Corona Energy 21-Dec-17 Closed Modification Distribution Rejected End of process 31-Jan-18 Northern Gas Networks 3 Requested Text 16/01/2018 08/01/2018 Y and AMR sites from 01 February 2018 21/12/17

Panel Mandate monthly read submission for Smart 0633 Corona Energy 09-Oct-17 Closed Modification Distribution Withdrawn End of process 21-Dec-17 Northern Gas Networks 3 Requested Text 09/11/2017 07/11/2017 Y and AMR sites from 01 December 2017 19/10/17

Panel 0632 S Shipper asset details reconcilation Corona Energy 09-Oct-17 Closed Self-Governance Distribution Implemented Effective date 10-Apr-18 Cadent 2 Requested 08/02/2018 24/01/2018 Y 18/01/18

0631 R Review of NDM algorithm post-Nexus Corona Energy 06-Oct-17 Closed Request Distribution Request Closed End of process 19-Apr-18 n/a n/a

Review of the consequential changes required 0630 R in UNC as a result of the Ofgem Switching Cadent 06-Oct-17 Closed Request Distribution Request Closed End of process 16-May-19 n/a n/a Programme

Standard Design Connections: A2O connection Text provided 0629 S National Grid NTS 04-Oct-17 Closed Self-Governance Transmission Implemented Effective date 30-Oct-18 National Grid NTS n/a 26/03/2018 N process modification with mod

Text provided 0628 S Standard Design Connections: PARCA process National Grid NTS 04-Oct-17 Closed Self-Governance Transmission Implemented Effective date 30-Oct-18 National Grid NTS n/a 26/03/2018 N with mod

Removal of the absolute requirement to include Panel 0627 S a Remotely Operable Valve (ROV) Installation National Grid NTS 08-Sep-17 Closed Self-Governance Transmission Implemented Effective date 17-Jan-18 National Grid NTS n/a Requested Text 16/11/2017 16/11/2017 Y for all new NTS Exit Connections 16/11/17

Updating UNC Section B to correct a number of 0626 FT references to the timing of processes National Grid NTS 08-Sep-17 Closed Fast Track Transmission Implemented Effective date 13-Oct-17 National Grid NTS n/a associated with the start of a Gas Day

Panel Extension of 4 months to 10 months to transfer 0625 Gazprom 01-Aug-17 Closed Modification Distribution Implemented Effective date 28-Nov-17 SGN 1 Requested Text 19/10/2017 19/10/2017 Y non-mandatory sites from Class 1 19/10/17

Review of arrangements for Retrospective No Text req'd - 0624 R Adjustment of Meter Information, Meter Cadent 07-Jul-17 Closed Request Other Request Closed End of process 15-Feb-18 N/A - Request n/a Request Point/Supply Point and Address data

Panel Governance Arrangements for Alternatives to Wales & West 0623 03-Jul-17 Closed Modification Governance Implemented Effective date 20-Apr-18 Wales & West Utilities n/a Requested Text 07/12/2017 30/11/2017 Y Self-Governance Modification Proposals Utilities 16/11/17

Correct allocation of Shrinkage Error as 0622 Gazprom 13-Jun-17 Closed Modification Distribution Withdrawn End of process 03-Jul-17 Cadent 8 identified by the AUGE

Amendments to Gas Transmission Charging 0621 L Shell 26-Apr-18 Closed Modification NTS CMF Rejected End of process 20-Dec-18 National Grid NTS n/a Regime

Amendments to Gas Transmission Charging Gateway LNG 0621 K 24-Apr-18 Closed Modification NTS CMF Rejected End of process 20-Dec-18 National Grid NTS n/a Regime Company Ltd

Amendments to Gas Transmission Charging 0621 J RWE 08-Mar-18 Closed Modification NTS CMF Rejected End of process 20-Dec-18 National Grid NTS n/a Regime

Amendments to Gas Transmission Charging 0621 H E.ON UK 02-Mar-18 Closed Modification NTS CMF Rejected End of process 20-Dec-18 National Grid NTS n/a Regime

Amendments to Gas Transmission Charging 0621 G Vitol S.A. Geneva 02-Mar-18 Closed Modification NTS CMF Withdrawn End of process 20-Apr-18 National Grid NTS n/a Regime

Amendments to Gas Transmission Charging 0621 F Interconnector 02-Feb-18 Closed Modification NTS CMF Rejected End of process 20-Dec-18 National Grid NTS n/a Regime

Amendments to Gas Transmission Charging 0621 E Uniper Energy 02-Feb-18 Closed Modification NTS CMF Rejected End of process 20-Dec-18 National Grid NTS n/a Regime

Amendments to Gas Transmission Charging Wales & West 0621 D 01-Feb-18 Closed Modification NTS CMF Rejected End of process 20-Dec-18 National Grid NTS n/a Regime Utilities

Amendments to Gas Transmission Charging 0621 C Centrica 01-Feb-18 Closed Modification NTS CMF Rejected End of process 20-Dec-18 National Grid NTS n/a Regime

Amendments to Gas Transmission Charging 0621 B SSE 12-Dec-17 Closed Modification NTS CMF Rejected End of process 20-Dec-18 National Grid NTS n/a Regime

Amendments to Gas Transmission Charging 0621 A Storengy 12-Dec-17 Closed Modification NTS CMF Rejected End of process 20-Dec-18 National Grid NTS n/a Regime

Amendments to Gas Transmission Charging 0621 National Grid NTS 05-Jun-17 Closed Modification NTS CMF Rejected End of process 20-Dec-18 n/a n/a Regime

Deferral of the UK Link Manual delivery date Text provided 0620 S Cadent 02-Jun-17 Closed Self-Governance Distribution Implemented Effective date 31-Jul-17 n/a n/a 05/06/2017 05/06/2017 Y (further revision) with mod

Panel Application of proportionate ratchet charges to 0619 B Centrica Energy 31-Oct-17 Closed Modification Distribution Rejected End of process 27-Jul-18 Wales & West Utilities 7 Requested Text 16/01/2018 16/01/2018 Y daily read sites 21/12/17

Panel Protection from ratchet charges for daily read Scotia Gas 0619 A 08-Sep-17 Closed Modification Distribution Rejected End of process 27-Jul-18 Wales & West Utilities 7 Requested Text 16/01/2018 27/10/2017 Y customers with an AQ of 732,00kWh and below Networks 21/12/17

Panel Application of proportionate ratchet charges to 0619 Gazprom 10-May-17 Closed Modification Distribution Rejected End of process 27-Jul-18 Wales & West Utilities 7 Requested Text 12/10/2017 20/09/2017 Y daily read sites 21/09/17

Extension of Invoicing Contingency Wales & West Text provided 0618 03-May-17 Closed Urgent Distribution Implemented Effective date 01-Jun-17 Wales & West Utilities n/a 05/05/2017 05/05/2017 Y Arrangements in case of Project Nexus defect Utilities with mod

Text provided 0617 S Revised UK Link Manual delivery date Cadent 07-Apr-17 Closed Self-Governance Distribution Implemented Effective date 01-Jun-17 Cadent n/a 20/04/2017 20/04/2017 Y with mod

Panel Capacity Conversion Mechanism for 0616 S National Grid NTS 06-Apr-17 Closed Self-Governance Transmission Implemented Effective date 10-Nov-17 National Grid NTS n/a Requested Text 08/09/2017 07/09/2017 Y Interconnection Points 17/08/17

Panel Representation on DSC Committees – 0615 S E.ON UK 31-Mar-17 Closed Self-Governance Distribution Implemented Effective date 11-Sep-17 Cadent 6 Requested Text 06/07/2017 21/06/2017 Y amendment to include mid-year appointments 15/06/2017

Introducing IHD (In-Home Display) Installed No Text req'd - 0614 EDF Energy 08-Mar-17 Closed Modification Distribution Withdrawn End of process 14-Jun-17 n/a n/a Status of Failed enabling Mod

Panel Revised UK Link Manual CDSP Data Services 0613 S Cadent 07-Mar-17 Closed Self-Governance Distribution Implemented Effective date 13-Oct-17 Cadent n/a Requested Text 10/08/2017 09/08/2017 Y Document 20/07/17

Project Management and Assurance provisions Scotia Gas No Text req'd - 0612 R 06-Feb-17 Closed Request None Withdrawn End of process 21-Mar-17 Scotia Gas Networks n/a n/a for gas industry changes Networks Request

Panel Amendments to the firm capacity payable price 0611 S National Grid NTS 03-Feb-17 Closed Modification Transmission Implemented Effective date 11-Aug-17 National Grid NTS n/a Requested Text 09/06/2017 26/05/2017 Y n/a at Interconnection Points 18/05/17

Panel 0610 S Project Nexus - Miscellaneous Requirements Cadent 11-Jan-17 Closed Self-Governance Distribution Implemented Effective date 07-Jun-17 Cadent n/a Requested Text 09/03/2017 17/02/2017 Y n/a 16/02/17 Transitional arrangements for gas settlement Panel and replacement of Meter Readings, retaining 0609 A British Gas 08-Feb-17 Closed Modification Distribution Withdrawn End of process 10-Mar-17 Cadent n/a Requested Text 09/03/2017 17/02/2017 Y AQ2017 16/02/17 (Project Nexus transitional modification) Transitional arrangements for gas settlement Panel 0609 and replacement of Meter Readings (Project Cadent 09-Jan-17 Closed Modification Distribution Implemented Effective date 22-May-17 Cadent n/a Requested Text 09/02/2017 17/02/2017 N n/a Nexus transitional modification) 19/01/17

Implementation of 'single service provision' Panel 0608 S arrangements for iGT connected system exit Cadent 09-Jan-17 Closed Self-Governance Distribution Implemented Effective date 15-May-17 Cadent n/a Requested Text 09/02/2017 01/02/2017 Y n/a points (Project Nexus transitional modification) 19/01/17

Amendment to Gas Quality NTS Entry No Text req'd - 0607 Specification at the St Fergus NSMP System BP 07-Dec-16 Closed Modification Transmission Implemented Effective date 28-Feb-18 National Grid NTS n/a enabling Mod Entry Point National Grid Gas plc and National Grid Gas Panel Nexus Imp 0606 S Distribution Limited transitional invoicing Cadent 05-Dec-16 Closed Self-Governance Distribution Implemented Effective date Cadent n/a Requested Text 09/02/2017 20/01/2017 Y n/a Date arrangement post Project Nexus 19/01/17 Amendments to TPD Section K - Additional Panel 0605 S Methods to Procure and Dispose of Operating National Grid NTS 02-Dec-16 Closed Self-Governance Transmission Implemented Effective date 11-Aug-17 National Grid NTS n/a Requested Text 09/02/2017 19/01/2017 Y n/a Margins Gas 19/01/17 Panel Central Data Services Provider – Arrangements Nexus Imp 0604 S Cadent 30-Nov-16 Closed Self-Governance Other Implemented Effective date Cadent n/a Requested Text 09/03/2017 16/02/2017 Y n/a following implementation of Project Nexus Date 16/02/17

Removal of liability for members of Wales & West Text provided 0603 S 08-Nov-16 Closed Self-Governance Distribution Implemented Effective date 11-Jan-17 Wales & West Utilities n/a 15/12/2016 15/12/2016 Y n/a Performance Assurance Committee Utilities with mod

Implementation of Non Effective Days and Panel Variant Non-Business Days for Project Nexus 0602 A RWE Npower 23-Dec-16 Closed Modification Distribution Implemented Effective date 20-Feb-17 Cadent n/a Requested Text 19/01/2017 19/01/2017 Y n/a Implementation, maintaining a minimum of two 19/01/17 Supply Point Business Days (Project Nexus Implementation of Non Effective Days and Panel Variant Non-Business Days for Project Nexus 0602 Cadent 07-Nov-16 Closed Modification Distribution Rejected End of process 17-Feb-17 Cadent n/a Requested Text 10/01/2017 12/01/2017 N n/a Implementation (Project Nexus transitional 15/12/16 modification) Revision of National Grid Gas plc’s Individual FT - text 0601 FT Network Code to reflect the correct company National Grid NTS 01-Nov-16 Closed Fast Track Transmission Implemented Effective date 09-Dec-16 National Grid NTS n/a provided with 17/11/2016 17/11/2016 Y n/a name mod

Panel Amend obligation for the acceptance of EPDQD 0600 S National Grid NTS 10-Oct-16 Closed Modification Transmission Implemented Effective date 07-Apr-17 National Grid NTS n/a Requested Text 10/11/2016 10/11/2016 Y n/a revisions made after D+5 20/10/16 Amendments to Capacity Allocations 0599 Mechanisms (Interruptible) to comply with EU National Grid NTS 10-Oct-16 Closed Modification European Withdrawn End of process 16-Nov-16 National Grid NTS n/a Mod withdrawn n/a Capacity Regulations Amendments to Capacity Allocations Panel 0598 S Mechanisms to comply with EU Capacity National Grid NTS 10-Oct-16 Closed Self-Governance Transmission Implemented Effective date 06-Apr-17 National Grid NTS n/a Requested Text 10/01/2017 16/12/2016 Y n/a Regulations 15/12/16 Panel Rules for the release of incremental capacity at 0597 National Grid NTS 10-Oct-16 Closed Modification Transmission Implemented Effective date 06-Apr-17 National Grid NTS n/a Requested Text 10/01/2017 23/12/2016 Y n/a Interconnection Points 15/12/16

Panel Implementing CGR3 decisions on Significant Wales & West 0596 07-Oct-16 Closed Modification Governance Implemented Effective date 17-Feb-17 Wales & West Utilities n/a Requested Text 10/11/2016 20/10/2016 Y n/a Code Reviews and self-governance Utilities 20/10/16

Amendment to the Arrangements between No Text req'd - 0595 S National Grid NTS and GNI at the Moffat IP to National Grid NTS 02-Sep-16 Closed Self-Governance Transmission Implemented Effective date 09-Dec-16 n/a n/a n/a enabling Mod Provide for Interruption of Virtual Reverse Flow Meter Reading Submission for Advanced & No Text req'd - 0594 R Gazprom 02-Sep-16 Closed Request Distribution Request Closed End of process 21-Dec-17 N/A - Request n/a n/a Smart Metering Request Provision of access to Domestic Consumer Panel Northern Gas 0593 V data for Price Comparison Websites and Third 20-Jul-17 Closed Modification Distribution Implemented Effective date 15-Dec-17 Northern Gas Networks n/a Requested Text 06/10/2016 07/10/2016 N n/a Networks Party Intermediaries 15/09/2016 Provision of access to Domestic Consumer Panel Northern Gas 0593 data for Price Comparison Websites and Third 08-Aug-16 Closed Modification Distribution Withdrawn End of process 20-Jul-17 Northern Gas Networks n/a Requested Text 06/10/2016 07/10/2016 N n/a Networks Party Intermediaries 15/09/2016 Separation of National Grid Transmission and Panel 0592 S Distribution owned networks - Transitional Cadent 13-Jul-16 Closed Self-Governance Distribution Implemented Effective date 30-Sep-16 Cadent n/a Requested Text 11/08/2016 05/08/2016 Y n/a invoicing arrangements 21/07/2016

DSR - Removal of 7 day rolling profile Demand Side Text provided 0591 S National Grid NTS 13-Jul-16 Closed Self-Governance Implemented Effective date 12-Sep-16 National Grid NTS n/a 21/07/2016 21/07/2016 Y n/a functionality Response with mod

Review the options to remove the use of Fax No Text req'd - 0590 R E.ON UK 27-Jun-16 Closed Request Distribution Withdrawn End of process 16-Aug-16 n/a n/a machines within the UNC Request Panel Inclusion of CSEP Supply Meter Points within Nexus Imp 0589 S E.ON UK 27-Jun-16 Closed Self-Governance Distribution Implemented Effective date Scotia Gas Networks 5 Requested Text 11/08/2016 08/08/2016 Y n/a NDM Sampling Arrangements Date 21/07/2016 Review UNC arrangements relating to the Wales & West No Text req'd - 0588 R connection to and operation of gas fired 06-Jun-16 Closed Request Transmission Withdrawn End of process 05-Aug-16 n/a n/a Utilities Request generation on DN networks Panel 0587 Seasonal Energy Balancing Credit Cover Opus Energy 06-Jun-16 Closed Modification Transmission Implemented Effective date 01-May-17 National Grid NTS n/a Requested Text 09/09/2016 09/09/2016 Y Yes 18/08/2016 Resolution of minor legal text drafting conflicts Nexus Imp Text provided 0586 FT Cadent 06-Jun-16 Closed Fast Track Distribution Implemented Effective date Cadent n/a 16/06/2016 16/06/2016 Y n/a arising from UNC Modification 0432 Date with mod Separation of NTS and National Grid owned Panel 0585 networks – Calculation of Code Credit Limit Cadent 06-Jun-16 Closed Modification Distribution Withdrawn End of process 03-Aug-16 Cadent n/a Requested Text 07/07/2016 30/06/2016 Y n/a and Value at Risk 16/06/2016 Energy Theft Tip-Off Service (ETTOS) – Northern Gas Text provided 0584 S 01-Jun-16 Closed Self-Governance Distribution Implemented Effective date 12-Aug-16 Northern Gas Networks n/a 16/06/2016 16/06/2016 Y n/a Release of Supplier identity Networks with mod Panel Requiring an Opening Meter Reading at same Nexus Imp 0583 S Cadent 10-May-16 Closed Self-Governance Distribution Implemented Effective date Cadent n/a Requested Text 10/06/2016 10/06/2016 Y n/a User Confirmation Date 19/05/2016 Amendments to reflect separation in legal Panel ownership of NTS and National Grid owned 0582 S Cadent 09-May-16 Closed Self-Governance Distribution Implemented Effective date 12-Sep-16 Cadent n/a Requested Text 19/05/2016 19/05/2016 Y n/a LDZs to facilitate the sale of National Grid's 19/05/2016 Gas Distribution Business Amending the Oxygen content limit specified in No Text req'd - 0581 S British Gas Trading 08-Apr-16 Closed Self-Governance Transmission Implemented Effective date 12-Aug-16 n/a n/a n/a the Network Entry Agreement at Grain LNG enabling Mod Implementation of Non Effective Days to enable Scotia Gas Text provided 0580 VS Annual AQ Review (independent of Nexus 21-Jul-16 Closed Self-Governance Distribution Implemented Effective date 12-Aug-16 Scotia Gas Networks n/a 19/05/16 19/05/16 Y Networks with mod transition) Implementation of Non Effective Days to enable Scotia Gas Text provided 0580 S Annual AQ Review (independent of Nexus 07-Apr-16 Closed Self-Governance Distribution Withdrawn End of process 21-Jul-16 Scotia Gas Networks n/a 19/05/16 19/05/16 Y Networks with mod transition) FT - Text Updating code to reflect the correct ‘Designated 0579 FT British Gas 04-Apr-16 Closed Fast Track Governance Implemented Effective date 16-May-16 Cadent 4 provided with 21/04/16 21/04/16 Y n/a Person’ mod Implementation of Retrospective Invoice Panel 0578 Adjustment arrangements (Project Nexus Cadent 09-Mar-16 Closed Modification Nexus Implemented Effective date 18-Aug-16 Cadent n/a Requested Text 13/05/2016 13/05/2016 Y transitional modification) 21/04/2016 Aligning UNC to the indirect clearing model Text provided 0577 S National Grid NTS 09-Mar-16 Closed Self-Governance Transmission Implemented Effective date 16-May-16 National Grid NTS n/a 17/03/2016 17/03/2016 Y operated by ICE Endex with mod Generation of an estimated Meter Reading at Panel Nexus Imp 0576 the Code Cut Off Date in the absence of an Cadent 09-Mar-16 Closed Modification Nexus Implemented Effective date Cadent n/a Requested Text 13/05/2016 13/05/2016 Y Date actual Meter Reading 21/04/2016 Consider the Performance Assurance No Text req'd - 0575 R Scottish Power 03-Mar-16 Closed Request Offtake Request Closed End of process 18-Aug-16 n/a n/a Reporting Requirements for Transporters Request Creating the permission to release supply point Panel 0574 data to the Theft Risk Assessment Service RWE Npower 08-Feb-16 Closed Modification Distribution Implemented Effective date 09-Dec-16 Northern Gas Networks 3 Requested Text 07/07/2016 13/07/2016 N (TRAS) 16/06/2016 Project Nexus – deferral of implementation of Urgent - text Nexus Imp 0573 elements of Retrospective Adjustment Cadent 08-Feb-16 Closed Urgent Distribution Implemented Effective date Cadent n/a provided with Date arrangements mod Panel Amendment to the definition of AUG Year Nexus Imp 0572 British Gas 08-Jan-16 Closed Modification Distribution Implemented Effective date Scotia Gas Networks 1 Requested Text 10/03/2016 04/03/2016 Y within UNC TPD Section E Date 18/02/16 Application of Ratchet Charges to Class 1 Panel 0571 A Supply Points and Class 2 with an AQ above E.ON UK 05-May-16 Closed Modification Distribution Withdrawn End of process 11-May-17 Cadent n/a Requested Text 07/07/2016 22/06/2016 Y 73,200kWhs 16/06/2016 Panel Application of Ratchets Charges to Class 1 0571 Gazprom 24-Dec-15 Closed Modification Distribution Withdrawn End of process 10-May-17 Cadent 8 Requested Text 07/07/2016 22/06/2016 Y Supply Points Only 16/06/2016 Obligation on Shippers to provide at least one Panel 0570 valid meter reading per meter point into Scottish Power 03-Dec-15 Closed Modification Distribution Implemented Effective date tbc Cadent 6 Requested Text 06/07/2017 23/05/2017 Y settlement once per annum 15/06/2017 Panel Removal of the minimum security requirement 0569 S Locus Energy 03-Dec-15 Closed Self-Governance Transmission Implemented Effective date 11-Mar-16 National Grid NTS n/a Requested Text 11/02/2016 21/01/2016 Y n/a from the Energy Balancing Credit Rules 21/01/16 Security Requirements and Invoice Payment Panel 0568 Settlement Cycle for the Trading System ICE Endex 06-Nov-15 Closed Modification Transmission Implemented Effective date 01-Aug-16 National Grid NTS n/a Requested Text 11/02/2016 29/01/2016 Y Clearer 21/01/16

Amendment to reference temperature No Text req'd - 0567 S conditions within the National Grid NTS – IUK National Grid NTS 06-Nov-15 Closed Self-Governance Transmission Implemented Effective date 12-Feb-16 n/a n/a enabling Mod Interconnection Agreement Panel UNC modification stakeholder engagement and Scotia Gas 0566 S 06-Nov-15 Closed Self-Governance Governance Implemented Effective date 12-Feb-16 Scotia Gas Networks n/a Requested Text 12/01/2016 17/12/2015 Y Guidelines Networks 17/12/15 Central Data Service Provider: General Scotia Gas Pane Requested 0565 B 26-Oct-16 Closed Modification Other Rejected End of process 19-Jan-17 National Grid Distribution n/a 18/11/2016 02/11/2016 Y n/a framework and obligations Networks Text 28/10/16 Panel Central Data Service Provider: General 0565 A E.ON UK 10-Oct-16 Closed Modification Other Implemented Effective date 01-Apr-17 National Grid Distribution n/a Requested Text 10/11/2016 02/11/2016 Y n/a framework and obligations 20/10/16 Panel Central Data Service Provider: General National Grid 0565 05-Nov-15 Closed Modification Other Rejected End of process 19-Jan-17 National Grid Distribution n/a Requested Text 10/11/2016 02/11/2016 Y n/a framework and obligations Distribution 20/10/16 Review of Annual Read Meter Reading National Grid No Text req'd - 0564 R 14-Oct-15 Closed Request Distribution Request Closed End of process 16-Jun-16 n/a n/a requirements Distribution Request Panel Moving the NTS Optional Commodity Charge 0563 S SSE 12-Oct-15 Closed Self-Governance NTS CMF Implemented Effective date 12-Feb-16 National Grid NTS n/a Requested Text 12/01/2016 17/12/2015 Y Formula into the UNC 17/12/15 Amendment to the Effective Date of FT - text 0562 FT Modification 0519 ‘Harmonisation of Reference National Grid NTS 02-Oct-15 Closed Fast Track None Implemented Effective date 06-Nov-15 National Grid NTS n/a provided with 15/10/2015 15/10/2015 Y n/a Conditions at Interconnection Points’ mod Amendment to the oxygen limit within the BBL / No Text req'd - 0561 S National Grid NTS 02-Oct-15 Closed Self-Governance Transmission Implemented Effective date 11-Dec-15 n/a n/a n/a NTS Interconnection Agreement enabling Mod Addressing under-allocation of flows from BBL 0560 arising from misalignment of reference GasTerra 30-Sep-15 Closed Urgent Transmission Implemented Effective date 08-Dec-15 National Grid NTS n/a Urgent Mod 10/11/2015 09/11/2015 Y n/a conditions FT - text Correction of a minor legal text reference 0559 FT National Grid NTS 28-Sep-15 Closed Fast Track None Implemented Effective date 06-Nov-15 National Grid NTS n/a provided with 15/10/2015 15/10/2015 Y n/a related to Information Provision changes mod 0558 Standardisation of Industry Payment Terms RWE Npower 04-Sep-15 Closed Modification Distribution Withdrawn End of process 05-Nov-15 Scotia Gas Networks 5 Mod withdrawn n/a Notice Period for Changes to Transportation 0557 Charges resulting from Uncertain costs allowed E.ON UK 04-Sep-15 Closed Modification DN CMF Withdrawn End of process 13-Nov-15 National Grid Distribution 4 Mod withdrawn n/a expenditure - financial adjustments Amendment to the Legal Text provided for FT - text National Grid 0556 FT “Modification 0548 Project Nexus – deferral of 04-Sep-15 Closed Fast Track None Implemented Effective date 09-Oct-15 National Grid Distribution n/a provided with 17/09/2015 17/09/2015 Y n/a Distribution Implementation Date” mod Review of the Market Operator (OCM) Market No Text req'd - 0555 R National Grid NTS 04-Sep-15 Closed Request Request Closed End of process 17-Mar-16 n/a n/a n/a Provisions Operator Request FT - text Scotia Gas 0554 FT Gender-neutral terms within the UNC 26-Aug-15 Closed Fast Track None Implemented Effective date 09-Oct-15 Scotia Gas Networks n/a provided with 17/09/2015 17/09/2015 Y n/a Networks mod Removal of National Grid LNG Storage UNC Panel National Grid LNG 0553 S TPD Section Z obligations and associated 07-Aug-15 Closed Self-Governance Transmission Implemented Effective date 11-Dec-15 National Grid NTS n/a Requested Text 08/10/2015 30/09/2015 Y n/a Storage cross-references 17/09/2015 Panel 0552 S UNC Section Y Housekeeping National Grid NTS 07-Aug-15 Closed Self-Governance None Implemented Effective date 09-Oct-15 National Grid NTS n/a Requested Text 10/09/2015 07/08/2015 Y n/a 20/08/2015 Protecting consumers who are disaggregated Panel 0551 under Modification 0428 from Ratchet charges Gazprom 06-Aug-15 Closed Modification Distribution Rejected End of process 21-Mar-16 Northern Gas Networks 3 Requested Text 08/10/2015 05/10/2015 Y n/a for Winter 2015 17/09/2015 Panel Project Nexus: Incentivising Central Project 0550 RWE Npower 04-Aug-15 Closed Modification Governance Rejected End of process 27-May-16 National Grid Distribution 2 Requested Text 11/02/2016 29/01/2016 Y n/a Delivery 21/01/16 Improving Arrangements for Managing Major 0549 Gazprom 14-Jul-15 Closed Modification Governance Withdrawn End of process 22-0ct-15 Scotia Gas Networks 1 Mod withdrawn n/a Industry Changes Urgent - text Project Nexus – deferral of Implementation National Grid 0548 14-Jul-15 Closed Urgent Nexus Implemented Effective date 14-Aug-15 National Grid Distribution n/a provided with n/a Date Distribution mod Panel Corrections to the EID arising from 0547 S National Grid NTS 03-Jul-15 Closed Self-Governance Transmission Implemented Effective date 09-Oct-15 National Grid NTS n/a Requested Text 06/08/2015 06/08/2015 Y n/a implementation of Modifications 0493/0500 16/07/2015 Panel Reduction of the Minimum Eligible Quantity 0546 S National Grid NTS 03-Jul-15 Closed Self-Governance Transmission Implemented Effective date 09-Oct-15 National Grid NTS n/a Requested Text 06/08/2015 05/08/2015 Y n/a (100,000kWh) for European IP capacity 16/07/2015 Panel Northern Gas 0545 S Changes to GDN MOD186 Publication dates 02-Jul-15 Closed Self-Governance DN CMF Implemented Effective date 06-Nov-15 Northern Gas Networks n/a Requested Text 10/09/2015 18/08/2015 Y n/a Networks 20/08/2015 Amendment to charging under Modification 0544 Gazprom 30-Jun-15 Closed Urgent Distribution Withdrawn End of process 02-Jul-15 National Grid Distribution 8 Mod withdrawn n/a 0428 - Single Meter Supply Points Ex-post removal of uncontrollable UNC charges 0543 at ASEPs which include sub-terminals Gazprom 23-Jun-15 Closed Modification Transmission Renumbered End of process 16-Jul-15 National Grid NTS n/a Mod withdrawn n/a operating on a 06.00 to 06.00 Gas Day

Ex-ante removal of uncontrollable UNC charges 0542 at ASEPs which include sub-terminals BP 23-Jun-15 Closed Modification Transmission Renumbered End of process 16-Jul-15 National Grid NTS n/a Mod withdrawn n/a operating on a 06.00 to 06.00 Gas Day

Ex-post removal of uncontrollable UNC charges Panel 0541 B at ASEPs which include sub-terminals Gazprom 16-Jul-15 Closed Modification Transmission Rejected End of process 26-May-16 National Grid NTS n/a Requested Text 11/02/2016 11/02/2016 Y n/a operating on a 06.00 to 06.00 Gas Day 21/01/16

Ex-ante removal of uncontrollable UNC charges Panel 0541 A at ASEPs which include sub-terminals BP 16-Jul-15 Closed Modification Transmission Rejected End of process 26-May-16 National Grid NTS n/a Requested Text 11/02/2016 11/02/2016 Y n/a operating on a 06.00 to 06.00 Gas Day 21/01/16 Removal of uncontrollable UNC charges at ASEPs which include sub-terminals operating 0541 EDF Trading 23-Jun-15 Closed Modification Transmission Withdrawn End of process 15-Dec-15 National Grid NTS n/a Mod withdrawn n/a on a 06.00 to 06.00 Gas Day via an ex-ante, quantity adjustment FT - text Scotia Gas 0540 FT Amendment to TPD Section G2.15 10-Jun-15 Closed Fast Track Distribution Implemented Effective date 07-Aug-15 Scotia Gas Networks n/a provided with 16/07/2015 16/07/2015 Y n/a Networks mod Deemed Text Removal of NTS Exit Commodity Charges for 0539 Barrow Shipping Ltd 05-Jun-15 Closed Modification DN CMF Rejected End of process 19-Nov-15 Scotia Gas Networks 5 Request 17/09/2015 17/09/2015 Y n/a Distributed Gas 17/09/15 FT - text Correcting legal text errors – gas Security of 0538 FT National Grid NTS 04-Jun-15 Closed Fast Track Transmission Implemented Effective date 01-Oct-15 National Grid NTS n/a provided with 18/06/2015 18/06/2015 Y n/a Supply Significant Code Review mod Change of Project Nexus Implementation Date Total Gas and 0537 27-Apr-15 Closed Modification Nexus Withdrawn End of process 18-Jun-15 National Grid Distribution n/a Mod withdrawn n/a to 1st April 2016 Power Project Nexus – deferral of implementation of National Grid 0536 elements of Retrospective Adjustment 24-Apr-15 Closed Modification Nexus Withdrawn End of process 24-Jul-15 National Grid Distribution n/a Mod withdrawn n/a Distribution arrangements Implementation of Non-Effective Days to Panel Scotia Gas 0535 enable Annual AQ Review (independent of 06-Mar-15 Closed Modification Nexus Implemented Effective date 24-Jul-15 Scotia Gas Networks n/a Requested Text 07/05/2015 07/05/2015 Y TBC Networks Nexus transition) 16/04/2015 Maintaining the Efficacy of the NTS Optional Panel 0534 Commodity ('shorthaul') Tariff at Bacton Entry Gazprom 06-Mar-15 Closed Modification Transmission Implemented Effective date 01-Aug-16 National Grid NTS n/a Requested Text 06/08/2015 23/07/2015 Y TBC Points 16/07/2015 Corrections to Network Entry Provisions in the No Text req'd - 0533 S National Grid NTS-BBL Interconnection National Grid NTS 06-Mar-15 Closed Self-Governance Transmission Implemented Effective date 15-Jun-15 National Grid NTS n/a n/a enabling Mod Agreement Panel Implementation of Non-Effective Days (Project National Grid 0532 06-Mar-15 Closed Modification Nexus Rejected End of process 30-Jun-16 National Grid Distribution n/a Requested Text 10/12/2015 03/12/2015 Y n/a Nexus transitional modification) Distribution 19/11/2015 Panel 0531 Provision of an Industry User Test System SSE 09-Feb-15 Closed Modification Nexus Rejected End of process 20-Oct-16 National Grid Distribution 4 Requested Text 13/05/2016 06/05/2016 Y n/a 21/04/2016 Use of Supply Point Register data for Project National Grid 0530 06-Feb-15 Closed Modification Nexus Withdrawn End of process 18-Feb-15 National Grid Distribution n/a Mod withdrawn n/a Nexus 'Market Trials' Testing Phase Distribution Implementation of Retrospective Adjustment Panel National Grid 0529 arrangements (Project Nexus transitional 06-Feb-15 Closed Modification Nexus Rejected End of process 10-Feb-16 National Grid Distribution n/a Requested Text 11/06/2015 21/05/2015 Y n/a Distribution modification) 21/05/15 Implementation of Supply Point Administration, Panel National Grid 0528 V gas allocation and settlement arrangements 20-Aug-15 Closed Modification Nexus Implemented Effective date 11-Feb-16 National Grid Distribution n/a Requested Text 07/05/2015 16/04/2015 Y n/a Distribution (Project Nexus transitional modification) 16/04/2015

Implementation of Supply Point Administration, Panel National Grid 0528 gas allocation and settlement arrangements 06-Feb-15 Closed Modification Nexus Withdrawn End of process 20-Aug-15 National Grid Distribution n/a Requested Text 07/05/2015 16/04/2015 Y n/a Distribution (Project Nexus transitional modification) 16/04/2015 Implementation of Annual Quantity Panel National Grid 0527 arrangements (Project Nexus transitional 06-Feb-15 Closed Modification Nexus Implemented Effective date 11-Feb-16 National Grid Distribution n/a Requested Text 07/05/2015 16/04/2015 Y n/a Distribution modification) 16/04/2015 Panel Identification of Supply Meter Point pressure 0526 S E.ON UK 06-Feb-15 Closed Self-Governance Distribution Rejected End of process 16-Jun-16 Northern Gas Networks 3 Requested Text 13/05/2016 13/05/2016 Y n/a tier 21/04/2016 Panel Enabling EU Compliant Interconnection 0525 National Grid NTS 04-Feb-15 Closed Modification European Implemented Effective date 01-Oct-15 National Grid NTS n/a Requested Text 12/06/15 04/06/2015 Y n/a Agreements 21/05/15 Enabling the Use of Pre Nexus Meter Reads for 0524 the purposes of Post Nexus Rolling AQ Gazprom 23-Jan-15 Closed Modification Nexus Withdrawn End of process 11-Feb-15 National Grid Distribution n/a Mod withdrawn n/a Calculation Supply Point Registration – Facilitation of Panel National Grid Nexus Imp 0523 S ‘faster switching’ for Shared Supply Meter 07-Jan-15 Closed Self-Governance Distribution Implemented Effective date National Grid Distribution n/a Requested Text 12/06/15 21/05/2015 Y n/a Distribution Date Points 21/05/15 Panel Governance of the use of email as a valid UNC 0522 S E.ON UK 08-Aug-14 Closed Self-Governance Distribution Rejected End of process 17-Dec-15 Northern Gas Networks n/a Requested Text 10/12/15 18/11/2015 Y n/a communication 19/11/15 Revision of User Admission Criteria to include Panel requested 0521 Transporter verification of its ability to transact National Grid NTS 10-Dec-14 Closed Modification NTS CMF Rejected End of process 11-May-15 National Grid NTS n/a 14/01/15 18/12/2014 Y n/a text 18/12/14 with the Applicant User

Panel 0520 A Performance Assurance Reporting E.ON UK 02-Oct-15 Closed Modification Distribution Implemented Effective date 01-Jan-17 Wales & West Utilities n/a Requested Text 10/12/2015 08/12/2015 Y TBC 19/11/2015 Panel requested 0520 Performance Assurance Reporting British Gas 25-Nov-14 Closed Modification Distribution Rejected End of process 25-Apr-16 Wales & West Utilities n/a 10/09/15 04/09/2015 Y TBC Text 20/08/15 Panel Harmonisation of Reference Conditions at 0519 National Grid NTS 07-Nov-14 Closed Modification European Implemented Effective date 01-Oct-15 National Grid NTS n/a Requested Text 05/02/15 16/01/15 Y n/a Interconnection Points 15/01/15 Panel Shipper Verification of meter and address Scotia Gas 0518 S 31-Oct-14 Closed Self-Governance Distribution Implemented Effective date 01-Sep-17 Scotia Gas Networks n/a Requested Text 12/06/15 21/05/15 Y n/a details following system meter removals. Networks 21/05/15 Review of the Supply Matching Merit Order in Deemed Text 0517 B Setting Capacity Charges, Rolling Average to SSE 16-Dec-14 Closed Modification NTS CMF Rejected End of process 25-Sep-15 National Grid NTS n/a Request 09/07/15 18/06/15 Y n/a Reduce Volatility in Annual Charges 18/06/15 Review of the Supply Matching Merit Order in Wales & West Panel requested 0517 A Setting Capacity Charges and Timing of 11-Dec-14 Closed Modification NTS CMF Rejected End of process 25-Sep-15 National Grid NTS n/a 14/01/15 06/01/15 Y n/a Utilities text 18/12/14 Resultant Price Changes Review of the Supply Matching Merit Order in Panel requested 0517 National Grid NTS 03-Oct-14 Closed Modification NTS CMF Rejected End of process 25-Sep-15 National Grid NTS n/a 14/01/15 06/01/15 Y n/a Setting Capacity Charges text 18/12/14

Information provision by large Customers to aid Nexus Imp Panel requested 0516 S Wingas 16-Sep-14 Closed Self-Governance Distribution Implemented Effective date Scotia Gas Networks n/a 12/03/15 19/02/15 Y n/a understanding of site characteristics Date text 19/02/15 Resolution timescales for SRVs and USRVs Panel National Grid 0515 S 27-Aug-14 Closed Self-Governance Nexus Implemented Effective date 13-Mar-15 National Grid Distribution n/a Requested Text 11/12/14 04/12/14 Y n/a Distribution following Project Nexus Implementation 20/11/14 Extending the Daily Metered ‘voluntary’ service Panel National Grid Nexus Imp 0514 to Project Nexus Implementation Date plus six 27-Aug-14 Closed Modification Nexus Implemented Effective date National Grid Distribution n/a Requested Text 20/11/14 20/11/14 Y n/a Distribution Date months 20/11/14 UK Link Programme (Project Nexus) - National Grid 0513 20-Aug-14 Closed Urgent Nexus Implemented Effective date 27-Oct-15 National Grid Distribution n/a None Required Yes independent project assurance for Users Distribution Amendment to Section M to be consistent with Panel requested 0512 S British Gas 20-Aug-14 Closed Self-Governance Distribution Implemented Effective date 13-Mar-15 National Grid Distribution 2 14/01/15 18/12/14 Y n/a Faster Switching proposals text 18/12/14 Introduction of an Enduring Solution for 0511 managing Advanced Meters in central systems Gazprom 18-Aug-14 Closed Modification Nexus Withdrawn End of process 23-Jan-15 Northern Gas Networks n/a Mod withdrawn n/a post Nexus Panel Reform of Gas Allocation Regime at GB 0510 V National Grid NTS 16-Jul-15 Closed Modification European Implemented Effective date 01-Oct-15 National Grid NTS n/a Requested Text 06/08/15 16/07/15 Y n/a Interconnection Points 16/07/15 Panel Reform of Gas Allocation Regime at GB 0510 National Grid NTS 08-Aug-14 Closed Modification European Withdrawn End of process 16-Jul-15 National Grid NTS n/a Requested Text 05/02/15 19/01/15 Y n/a Interconnection Points 15/01/15 Permission to release Protected Information to 0509 an Authorised Third Party for Performance E.ON UK 08-Aug-14 Closed Modification Governance Withdrawn End of process 24-Jun-15 Scotia Gas Networks 1 Mod withdrawn n/a Assurance settlement risk analysis DN Charging Revised Distributed Gas Charging National Grid 0508 04-Jul-14 Closed Modification Methodology Withdrawn End of process 24-Oct-14 National Grid Distribution n/a Mod withdrawn n/a Arrangements Distribution Forum Panel 0507 Changing The Effective Date of 0451AV Winchester Gas 01-Jul-14 Closed Modification Distribution Implemented Effective date 01-Nov-14 National Grid Distribution 8 Requested Text 11/09/14 21/08/14 Y n/a 21/08/13 Panel Gas Performance Assurance Framework and Performance 0506 AV SSE 19-Nov-15 Closed Modification Rejected End of process 17-Dec-15 Wales & West Utilities n/a Requested Text 10/12/15 19/11/15 Y n/a Governance Arrangements Assurance 19/11/15 Panel Gas Performance Assurance Framework and Performance 0506 A SSE 02-Jan-15 Closed Modification Withdrawn End of process 19-Nov-15 Wales & West Utilities n/a Requested Text 09/07/15 30/06/15 Y n/a Governance Arrangements Assurance 18/06/15 Panel Gas Performance Assurance Framework and Performance 0506 V Scottish Power 19-Nov-15 Closed Modification Implemented Effective date 29-Jan-16 Wales & West Utilities 7 Requested Text 10/12/15 19/11/15 Y n/a Governance Arrangements Assurance 19/11/15 Panel Gas Performance Assurance Framework and Performance 0506 Scottish Power 12-Jun-14 Closed Modification Withdrawn End of process 19-Nov-15 Wales & West Utilities 7 Requested Text 09/07/15 30/06/15 Y n/a Governance Arrangements Assurance 18/06/15 Update to UNC TPD Section G & M to correct Scotia Gas 0505 S anomalies arising from the implementation of 06-Jun-14 Closed Self-Governance Distribution Withdrawn End of process 22-Oct-14 Scotia Gas Networks n/a Mod withdrawn 10/07/14 30/06/14 n/a Networks UNC Modification 0463S Panel Demand Side Response (DSR) Methodology Demand Side 0504 National Grid NTS 04-Jun-14 Closed Modification Implemented Effective date 01-Mar-16 National Grid NTS n/a Requested Text 10/12/15 19/11/15 Y n/a Implementation Response 19/11/15 FT Mod - Text Update of Transporter Procedure Document (Proposed as FT - Text 0503 FT E.ON UK 02-Jun-14 Closed Fast Track Distribution Implemented Effective date 08-Aug-14 n/a provided with 18/07/14 18/07/14 Y n/a references within Network Code included) the Mod Amendment to Gas Quality NTS Entry No Text req'd - 0502 Specification at the px Teesside System Entry Energy24 Limited 01-May-14 Closed Modification Transmission Implemented Effective date 28-Sep-15 National Grid NTS n/a n/a enabling Mod Point

Treatment of Existing Entry Capacity Rights at the Bacton ASEP to comply with EU Capacity Panel requested 0501 CV Eni 01-May-15 Closed Modification European Rejected End of process 20-Jul-15 National Grid NTS n/a 14/01/15 14/01/15 Y n/a Regulations, including a capped capacity text 18/12/14 return option and an aggregate overrun regime.

Treatment of Existing Entry Capacity Rights at Panel the Bacton ASEP to comply with EU Capacity 0501 C Eni 07-Nov-14 Closed Modification European Withdrawn End of process 01-May-15 National Grid NTS n/a Requested Text 06/11/14 17/10/14 Y Yes Regulations, including a capped capacity 16/10/14 return option and an aggregate overrun regime. Treatment of Existing Entry Capacity Rights at Panel the Bacton ASEP to comply with EU Capacity 0501 BV Centrica Storage 01-May-15 Closed Modification European Rejected End of process 20-Jul-15 National Grid NTS n/a Requested Text 09/10/14 02/10/14 Y n/a Regulations, including a restricted capacity 18/09/14 return option. Treatment of Existing Entry Capacity Rights at Panel the Bacton ASEP to comply with EU Capacity 0501 B Centrica Storage 10-Oct-14 Closed Modification European Withdrawn End of process 01-May-15 National Grid NTS n/a Requested Text 09/10/14 02/10/14 Y n/a Regulations, including a restricted capacity 18/09/14 return option. Treatment of Existing Entry Capacity Rights at Panel 0501 AV the Bacton ASEP to comply with EU Capacity Centrica Energy 01-May-15 Closed Modification European Rejected End of process 20-Jul-15 National Grid NTS n/a Requested Text 09/10/14 02/10/14 Y n/a Regulations, including capacity return option. 18/09/14

Treatment of Existing Entry Capacity Rights at Panel 0501 A the Bacton ASEP to comply with EU Capacity Centrica Energy 23-Jul-14 Closed Modification European Withdrawn End of process 01-May-15 National Grid NTS n/a Requested Text 09/10/14 02/10/14 Y n/a Regulations, including capacity return option. 18/09/14 Treatment of Existing Entry Capacity Rights at Panel 0501 V the Bacton ASEP to comply with EU Capacity National Grid NTS 01-May-15 Closed Modification European Implemented Effective date 21-Jul-15 National Grid NTS n/a Requested Text 09/10/14 02/10/14 Y n/a Regulations 18/09/14 Treatment of Existing Entry Capacity Rights at Panel 0501 the Bacton ASEP to comply with EU Capacity National Grid NTS 01-May-14 Closed Modification European Withdrawn End of process 01-May-15 National Grid NTS n/a Requested Text 09/10/14 02/10/14 Y n/a Regulations 18/09/14 EU Capacity Regulations – Capacity Allocation Panel 0500 Mechanisms with Congestion Management National Grid NTS 01-May-14 Closed Modification European Implemented Effective date 19-Jun-15 National Grid NTS n/a Requested Text 09/10/14 02/10/14 Y n/a Procedures 18/09/14 FT - text National Grid 0499 FT Amendment to TPD Section G1.6.13(e)(iv) 10-Apr-14 Closed Fast Track Distribution Implemented Effective date 01-Oct-14 National Grid Distribution n/a provided with 18/09/2014 18/09/2014 Y n/a Distribution mod Amendment to Gas Quality NTS Entry No Text req'd - 0498 BP Gas Marketing 04-Apr-14 Closed Modification Transmission Implemented Effective date 28-Sep-15 National Grid NTS n/a n/a Specification at BP Teesside System Entry enabling Mod Panel Removal of the CSEP NExA table held within 0497 RWE Npower 04-Apr-14 Closed Modification Distribution Implemented Effective date 27-Feb-15 National Grid Distribution 6 Requested Text 11/09/14 21/08/14 Y n/a Annex A part 8 21/08/13 FT - text Reinstatement of Calendar Days as a measure Scotia Gas 0496 FT 04-Apr-14 Closed Fast Track Governance Implemented Effective date 14-May-14 Scotia Gas Networks n/a provided with 17/04/2014 17/04/2014 Y n/a in Section G2.5.8(b) Networks mod 0495 Introduction of a Change Board for the UNC E.ON UK 04-Apr-14 Closed Modification Governance Withdrawn End of process 04-Nov-14 Scotia Gas Networks 5 Mod withdrawn n/a Imbalance Charge amendments required to Panel requested 0494 align the UNC with the Network Code on Gas National Grid NTS 04-Apr-14 Closed Modification European Implemented Effective date 01-Oct-15 National Grid NTS n/a 10/07/14 19/06/14 Y n/a Text 19/06/14 Balancing of Transmission Networks Panel EU Gas Balancing Code - Daily Nominations at 0493 National Grid NTS 04-Apr-14 Closed Modification European Implemented Effective date 19-Jun-15 National Grid NTS n/a Requested Text 09/10/14 19/09/14 Y n/a Interconnection Points (IP) 18/09/14 Governance change - update to Mod Rules FT - text 0492 FT following Consumers' Representative's name National Grid NTS 04-Apr-14 Closed Fast Track Governance Implemented Effective date 09-Jun-14 National Grid NTS n/a provided with 09/06/14 15/05/14 Y n/a change mod Sugg Text was Change Implementation Date of Project Nexus confirmed as 0491 National Grid NTS 10-Mar-14 Closed Modification Distribution Rejected End of process 16-May-14 National Grid NTS n/a 01/04/14 11/03/14 Y n/a to 1st April 2016 formal Text at Panel 11/03/14 Updates to UNC TPD Section B to correct FT - text anomalies arising from the implementation of 0490 S National Grid NTS 07-Mar-14 Closed Self-Governance Transmission Implemented Effective date 14-May-14 National Grid NTS n/a provided with 15/05/2014 15/05/2014 Y n/a UNC Modification 0376S “Increased Choice mod when Applying for NTS Exit Capacity EU Gas Balancing Code - Information Panel requested 0489 Provision changes required to align the UNC National Grid NTS 07-Mar-14 Closed Modification European Implemented Effective date 01-Oct-15 National Grid NTS n/a 10/07/14 19/06/14 Y n/a Text 19/06/14 with the EU Code Panel requested 0488 S Additional Changes to the Mod 81 Reports Scottish Power 07-Mar-14 Closed Self-Governance Distribution Implemented Effective date 01-Jul-14 National Grid Distribution 4 09/06/14 15/05/14 Y n/a text 15/05/14

Panel requested Introduction of an Advanced Meter Reader text 17/07/14, 0487 V (AMR) Service Provider (ASP) Identifier (ASP Gazprom 16-Oct-14 Closed Self-Governance Distribution Implemented Effective date 01-Apr-15 Northern Gas Networks 3 05/09/14 05/09/14 Y Yes NGN 'stop' note ID) and Advanced Meter Indicator 12/08/14

Introduction of Advanced Meter Indicator and Panel requested Advanced Meter Reader (AMR) Service text 17/07/14, 0487 S Gazprom 05-Mar-14 Closed Self-Governance Distribution Withdrawn End of process 16-Oct-14 Northern Gas Networks 3 05/09/14 05/09/14 Y n/a Provider Identifier in advance of Project Nexus NGN 'stop' note Go Live 12/08/14 0486 Use of the Pre-Payment Profile For IGTs Winchester Gas 25-Feb-14 Closed Modification Distribution Withdrawn End of process 04-Jul-14 National Grid Distribution 2 Withdrawn n/a Introduction of the Long-term use-it-or-lose-it Panel requested 0485 mechanism to facilitate compliance with the EU National Grid NTS 07-Feb-14 Closed Modification European Implemented Effective date 30-Sep-14 National Grid NTS n/a 05/06/14 30/05/14 Y n/a text 15/05/14 Congestion Management Procedures Panel requested 0484 S Guidance for the production of legal text Gazprom 07-Feb-14 Closed Self-Governance Governance Implemented Effective date 11-Jul-14 Scotia Gas Networks 1 14/03/2014 14/03/14 Y n/a text 20/02/14

Performance Assurance Framework Incentive Performance National Grid Distribution 0483 British Gas 07-Feb-14 Closed Modification Withdrawn End of process 06-Mar-15 8 Mod withdrawn n/a Regime Assurance transferred to WWU

Proposed Changes to Mod 81 Reports to be Panel requested 0482 S Scottish Power 06-Feb-14 Closed Self-Governance Distribution Implemented Effective date 01-Jul-14 Wales & West Utilities 7 13/03/14 30/04/14 N n/a effective from 01/7/14 text 20/02/14

Amendment to AQ Values Present Within 04/02/14 CW 0481 Annex A of the CSEP NExA AQ Table SSE 03-Feb-14 Closed Modification Distribution Implemented Effective date 01-Oct-14 National Grid Distribution confirmed none n/a Following the 2013 AQ Review required for UNC FT - text Northern Gas 0480 FT Minor update to UNC General Terms Section B 27-Jan-14 Closed Fast Track Distribution Implemented Effective date 14-Mar-14 Northern Gas Networks provided with 14/03/2014 14/03/2014 Y n/a Networks mod Panel Inclusion of email as a valid UNC Northern Gas 0479 S 27-Jan-14 Closed Self-Governance Distribution Implemented Effective date 13-Mar-15 Northern Gas Networks Requested Text 11/12/14 02/12/14 Y n/a communication’ Networks 20/11/14 Sugg Text was Filling the gap for SOQ reductions below Northern Gas confirmed as 0478 27-Jan-14 Closed Modification Distribution Implemented Effective date 01-Oct-14 Northern Gas Networks n/a BSSOQ until Project Nexus Networks formal Text at Panel 20/02/14 Supply Point Registration - Facilitation of Panel requested 0477 British Gas 03-Jan-14 Closed Modification Distribution Implemented Effective date 07-Nov-14 Scotia Gas Networks Yes Faster Switching text 20/02/14 Sugg Text was DN Charging Alignment of DN Charging Methodology with National Grid confirmed as 0476 S 30-Dec-13 Closed Self-Governance Methodolgy Implemented Effective date 01-Apr-14 National Grid Distribution n/a RIIO-GD1 Arrangements Distribution formal Text at Forum Panel 16/01/13 Update to Section G, Annex G3 (Prospective Panel requested 0475 S Scottish Power 23-Dec-13 Closed Self-Governance Distribution Implemented Effective date 11-Jul-14 National Grid Distribution 09/06/14 08/04/14 Y n/a Erroneous Large AQ Calculation Proforma) text 15/05/14

Inclusion of the guidelines relating to the "Customer Settlement Error Claims Process" National Grid Panel requested 0474 S 10-Dec-13 Closed Self-Governance Distribution Implemented Effective date 09-Jun-14 National Grid Distribution Yes within UNC governance and introduction of the Distribution text 19/12/13 User Pays charges associated with such claims

Panel requested 0473 A Project Nexus – Allocation of Unidentified Gas British Gas 01-May-14 Closed Modification Nexus Rejected End of process 20-Nov-14 Northern Gas Networks 06/11/14 12/11/14 N Yes text 16/10/14

Nexus Imp Panel requested 0473 Project Nexus – Allocation of Unidentified Gas Gazprom 18-Nov-13 Closed Modification Nexus Implemented Effective date Northern Gas Networks 13/05/14 14/05/14 N Yes Date text 17/04/14

Reporting the number of registration attempts Panel requested 0472 S RWE Npower 11-Nov-13 Closed Self-Governance Distribution Implemented Effective date 15-Sep-14 National Grid Distribution 10/07/14 08/07/14 Y n/a by a Gas Shipper text 19/06/2014

Amending the start time that a Day-ahead Panel requested 0471 S EDF Energy 08-Nov-13 Closed Self-Governance Transmission Implemented Effective date 29-Apr-14 National Grid NTS Yes Market Offer can be accepted text 21/11/13 Notification of Minimal Safety operating gas Withdrawn 0470 Wingas 04-Oct-13 Closed Modification Distribution Withdrawn End of process 16-Sep-14 Scotia Gas Networks n/a needs of large customers 16/09/14 Panel requested 0469 S Transporter Gas Safety Visit Reporting British Gas 04-Oct-13 Closed Self-Governance Distribution Implemented Effective date 14-Jan-15 National Grid Distribution 06/11/14 22/10/14 Y n/a text 16/10/14 Unique Property Reference Number (UPRN) Withdrawn 0468 E.ON UK 01-Oct-13 Closed Modification Distribution Withdrawn End of process 21-Dec-15 National Grid Distribution n/a Population by Gas Transporters 21/12/15 Project Nexus - iGT Single Service Provision; National Grid Panel requested 0467 01-Oct-13 Closed Modification Nexus Implemented Effective date 16-Jan-15 National Grid Distribution 07/11/13 04/02/14 N n/a data preparation Distribution text 17/10/13 (Panel Requested Text Daily Meter Reading Simplification with for 0466A 0466 AV Wingas 23-Jun-14 Closed Modification Distribution Implemented Effective date 01-Apr-16 National Grid Distribution 09/10/14 26/08/14 Y n/a improved within day data provision 18/09/14 - Mod withdrawn/replac ed by 0466AV) Panel Daily Meter Reading Simplification with 0466 A Wingas 23-Jun-14 Closed Modification Distribution Withdrawn End of process 19-Feb-15 National Grid Distribution Requested Text 09/10/14 26/08/14 Y Yes improved within day data provision 18/09/14

National Grid Panel requested 0466 Daily Meter Reading Simplification 01-Oct-13 Closed Modification Distribution Rejected End of process 26-Mar-15 National Grid Distribution 05/06/14 19/05/14 Y n/a Distribution text 15/05/14 Introduction of the Planning and Advanced Sugg Text was Reservation of Capacity Agreement (PARCA), confirmed as 0465 V SSE 27-Sep-13 Closed Modification Transmission Implemented Effective date 02-Feb-15 National Grid NTS n/a Weighted Average PARCA Security formal Text at Panel 17/10/13 Alternative LNG supply to the Scottish Text was Independent Networks (SINs) Scotia Gas confirmed as 0464 06-Sep-13 Closed Urgent Distribution Implemented Effective date 31-Oct-13 Scotia Gas Networks n/a Networks formal Text at Panel 17/10/13 Recognition of the ‘2nd January’ Scottish Bank Panel requested 0463 S Holiday as a Business Day for Supply Point SSE 02-Aug-13 Closed Self-Governance Distribution Implemented Effective date 14-Mar-14 Scotia Gas Networks n/a text 21/11/13 related transactions Introducing Fast Track Self Governance into Scotia Gas Panel requested 0462 the Uniform Network Code 01-Aug-13 Closed Modification Governance Implemented Effective date 31-Dec-13 Scotia Gas Networks n/a Networks text 21/11/13 Changing the UNC Gas Day to Align with the Panel requested 0461 Gas Day in EU Network Codes National Grid NTS 07-Jun-13 Closed Modification Transmission Implemented Effective date 01-Oct-15 National Grid NTS n/a text 21/11/13 Alignment of capacity and revenue treatment NTS Charging 0460 S within the NTS Charging Methodology with National Grid NTS 07-Jun-13 Closed Self-Governance Methodology Implemented Effective date 11-Oct-13 National Grid NTS 20/06/2013 n/a RIIO-T1 arrangements Forum NTS Charging Amendments to the 'K' revenue adjustment 0459 S National Grid NTS 07-Jun-13 Closed Self-Governance Methodology Implemented Effective date 09-Sep-13 National Grid NTS 20/06/2013 n/a factor based on RIIO-T1 Forum Scotia Gas Panel requested 0458 Seasonal LDZ System Capacity 07-Jun-13 Closed Modification Distribution Implemented Effective date 28-Feb-15 Scotia Gas Networks n/a Networks text 21/11/13 Rights. Extending the use of the UK Link Network National Grid 0457 S (Information Exchange (IX)) to Meter Asset 04-Jun-13 Closed Self-Governance Distribution Implemented Effective date 13-Dec-13 National Grid Distribution 19/09/2013 n/a Distribution Provider (MAP) organisations Revision to the treatment of Allocation of 03/06/13 0456 British Gas 24-May-13 Closed Urgent Distribution Rejected End of process 28-Jun-13 National Grid Distribution n/a Unidentified Gas for the 2013/14 AUG Year (Ofgem) Updating of Meter Information by the National Grid Panel requested 0455 21-May-13 Closed Modification Distribution Implemented Effective date 27-May-14 National Grid Distribution Yes Transporter Distribution text 21/11/13 Introduction of a Long Term Non Firm Capacity 0454 National Grid NTS 02-May-13 Closed Modification Transmission Rejected End of process 20-Jun-14 National Grid NTS 19/09/2013 Yes Product 19/09/2013 National Grid 0453 Project Nexus - Demand Estimation 23-Apr-13 Closed Modification Nexus Withdrawn End of process 18-Oct-13 National Grid Distribution (mod withdrawn n/a Distribution 18/10/13) Sugg Text was Introduction of the Planning and Advanced confirmed as 0452 V National Grid NTS 05-Apr-13 Closed Modification Transmission Rejected End of process 05-Dec-14 National Grid NTS n/a Reservation of Capacity Agreement (PARCA) formal Text at Panel 17/10/13 Individual Settlements For Pre-Payment & 18/07/2013 Smart Meters (0451A); 0451 AV E.ON UK 04-Jul-13 Closed Modification Distribution Implemented Effective date 01-Feb-14 Northern Gas Networks 0451AV n/a provided 22/12/13 Individual Settlements For Pre-Payment & 20/06/2013(045 Smart Meters 1); revised text 0451 V Winchester Gas 27-Mar-13 Closed Urgent Distribution Rejected End of process 31-Jan-14 Northern Gas Networks Yes for 0451V 10/01/14