Ten Year Statement 2017 Electricity Ten Year Statement 2017 1 Appendix Contents

Appendix A includes a set of system schematics and geographic drawings of the current NETS, with the A approximate locations of existing power stations and reactive compensation plants shown. The schematics also show the NETS boundaries and ETYS zones we have used in our analysis. System schematics and geographic drawings Appendix A Geographical A1 – GB Existing Power Stations...... 2 A2 – GB Existing Transmission System...... 3 A3 – GB Transmission System Boundaries...... 4

Schematic A4 – GB Existing Transmission System...... 5 A5 – GB Transmission System ETYS Zones...... 6 A6 – GB Transmission System Boundaries...... 7 A7 – GB Reactive Compensation Plant...... 8 A ppendi x A x A ppendi A 2

Figure A1: GB Existing Power Stations

PLANT TYPE

Ness of Quoys Baillie & Bernaheig NUCLEAR Camster Causeymire Burn of Whilk

Buolfruich Cassley OIL & OCGT Gordonbush Moray Firth

Rosehall Lairg Kilbraur CCGT/CHP Lairg-Achany

Shin Loch Budhe HYDRO/PUMPED

Beinn Tharsiun STORAGE

Grudie Bridge Mossford Novar WIND Conon Corriemoillie Luichart Orrin Lochluichart Boyndie Fairburn Edintore OTHER Ben Aketil Deanie Cairn Uish Culligran Berry Burn Edinbane Corrimony Aigas Glens of Foundland Peterhead Kilmorack Moy Hills of Towie Dummuies Hywind SUBSTATIONS Fasnakyle Torr Achil Hill of Glaschyle Corriegarth Dunmaglass Stoneywood Bhlaraidh Paul's Hill Beinneun Glen Livishie Morrison Foyers Caennacroc Millennium Farr Glendoe

Invergarry Quoich

Kinlochleven Errochty Tullo Rannoch Clunie Pitlochry Drumderg Tummel Bridge Argyll Array Cashlie Lochay Tullymurdoch

Carraig Gheal Finlarig Inverawe Cruachan St. Fillans Clachan Griffin Nant Ardkinglas Sloy Braes of Doune An Suidhe Denny Markinch Exxon Earlsburn Longannet A Cruach Cruach Mho Grangemouth Torness Cour Tormywheel Islay Keithshill Harburn Head Aikengall Dun Law Fallago Freasdail Extension Crystal Rig 1 & 2 Pogbie Hunterston Wst BrowncastleBlack Law Aikengall 2 Extension Toddleburn Quixwood Calderwater Black Law Penmanshiel Sneddon Law Andershaw Whitelee Auchrobert Bowbeat Long Park Deucheran Whitelee Ext. Galawhistle Beinn an Tuirc Caledonian Paper Mill Tangy Farm Clyde North Afton Brockloch Whiteside Clyde South Assel Valley Hill Hadyard Hill DersallochSanquhar Harestanes Minnygap Lynemouth Steven’s Croft Moyle Mark Hill Blackcraig Minsca To Dalswinton Ewe Hill Glen App Arecleoch Kilgalioch

Airies

Glenchamber Tongland

Hartlepool

Teesside

Robin Rigg Wilton

Ormonde Hornsea Roosecote Heysham Walney I & II

West of Duddon Barrow Westermost Rough

Humber Gateway Drax Saltend East - West To Ireland Killingholme Keadby Immingham Burbo Bank Brigg South Humber Bank Gwynt y Mor North Hoyle Fiddlers West Burton Shotton Paper Ferry Cottam Race Bank CDCL Dudgeon Connahs Quay Inner Dowsing Rocksavage Lincs Deeside Dinorwig Lynn Sheringham Shoal East Anglia Ffestiniog Derwent

Spalding Sutton Bridge Ratcliffe-on-Soar Kings Lynn

Scroby sands

Corby Peterborough

Sizewell B

Little Barford

Greater Gabbard 500MW

Rye House Greater Gabbard 2nd part Pembroke Brimsdown Gunfleet Sands I&II BritNed To Netherlands Pen Y Cymoedd Baglan Bay Severn Power Taylors Lane Coryton Barking Uskmouth Medway Seabank Thanet Grain Damhead Creek Barry Aberthaw

Hinkley Point B

Marchwood Dungeness

Shoreham IFA To France Cowes

Langage Rampion

Indian Queens 3 Figure A2: GB Existing Transmission System

400kV Substations 275 kV Substations 132kV Substations

400kV Circuits 275kV Circuits 220kV Circuits 132kV Circuits Western HVDC Link Interconnectors

Dounreay Thurso

Mybster Major Generating Sites Including Pumped Storage

Cassley Moray Firth Dunbeath Connected at 400kV Connected at 275 kV Lairg Hydro Generation Harris Brora Shin Loch Buidhe

Grudie Bridge Mossford

Fyrish Alness Corriemoillie Fraserburgh Luichart Orrin Elgin Macduff St. Fergus Ardmore Deanie Keith Culligran Dingwall Strichen Nairn Aigas Kilmorack Inverness Blackhillock Dunvegan Peterhead Beauly Knocknagael Fasnakyle Dyce Kintore Persley Glen Broadford Morrison Woodhill Willowdale Caennacroc Foyers Clayhills Fort Boat of Quoich Garten Tarland Glendoe Craigiebuckler Redmoss Invergarry

Kinlochleven Tummel Fiddes

Fort William Errochty Power Station Errochty Rannoch Clunie Firth of Forth Tummel Bridge Tealing Dudhope Arbroath Lochay Cashlie Lyndhurst Milton of Craigie Taynuilt Killin Charleston Dalmally Finlarig Dudhope Cruachan Burghmuir Glenagnes St. Fillans Nant Clachan Inverarnan SCOTTISH HYDRO-ELECTRIC Cupar Inveraray Sloy TRANSMISSION Glenrothes Leven Devonside Westfield Redhouse Whistlefield Kincardine Stirling Dunfemline Glenniston Helensburgh Denny Mossmorran Port Ann Longannet Inverkeithing Dunoon Bonnybridge Grangemouth Shrubhill Cockenzie Dunbar Spango Cumbernald BroxburnTelford Rd. Portobelllo Bainsford Gorgie Valley Strathleven Windyhill Bathgate Crystal Rig Torness Lambhill Whitehouse Devol Easterhouse Fallago Smeaton Moor Coatbridge Livingston Newarthill Currie Kaimes Crossaig Hunterston Clydes Mill Black Law Extension NorthHunterston Strathaven Dunlaw Extension Berwick East Black Law Marshall Meadows Busby East Kilwinning Whitelee Wishaw Hunterston Kilbride Saltcoats Town Whitelee ExtnSouth Linnmill Eccles Meadowhead SP TRANSMISSION LTD Carradale Galashiels Kilmarnock Coalburn Ayr South Clyde (North) Dogger Bank Coylton Clyde (South) Elvanfoot Hawick New Cumnock Maybole Moffat Auchenwynd Black Hill Glenglass Hadyard Dun Hill Harestanes

Kendoon Ewe Hill CarsfadBlackcraig Markhill To Northern Ireland Glenlee Gretna Blyth Arecleoch Earlstoun Dumfries Ecclefechan Auchencrosh Fourstones Newton Stewart Tynemouth Chapelcross Harker South Shields Stella West Tongland West Boldon Glenluce Offerton Hawthorne Pit Hartmoor Spennymoor Hartlepool Saltholme Tod Point Norton Robin Rigg Greystones Grangetown

Hutton Hornsea Ormonde

Walney I & II Quernmore Heysham Osbaldwick Knaresborough West of Duddon Middleton Barrow Bradford Thornton West Kirkstall Skelton Poppleton Creyke Beck Westermost Rough Stanah Padiham Grange Monk Fryston Saltend North Hedon Penwortham Drax Humber Gateway Elland Saltend South Eggborough Rochdale Ferrybridge To Ireland To Ireland Washway Keadby Humber Refinery Burbo Bank Farm Kearsley Templeborough Thorpe Whitegate Killingholme Triton Knoll Kirkby West Marsh South Stalybridge Melton Humber West Gwynt y Mor Carrington Pitsmoor West Wylfa Rainhill Aldwarke Bank North Hoyle Winco Bank Burton Bredbury Neepsend Thurcroft Rhyl Flats Rocksavage Fiddlers Daines City Ferry Cottam Inner Dowsing Race Bank Dudgeon Flintshire Frodsham Jordanthorpe Bodelwyddan Bridge Norton Lees Pentir Macclesfield Capenhurst Chesterfield Lincs High Dinorwig Connah’s Quay South Manchester Marnham Sheringham Shoal East Anglia Staythorpe Lynn Legacy Ffestiniog Cellarhead Stoke Bardolph Bicker Fen Ratcliffe Willington on Soar Trawsfynydd

Drakelow Walpole Rugeley Spalding North Necton Ironbridge Sutton Norwich Main Bushbury Bridge Scroby sands Willenhall Shrewsbury Penn Bustleholm Enderby Hams Hall Ocker Hill Nechells Oldbury Kitwell Berkswell

Burwell Main Sizewell Feckenham Grendon Bishops Wood Eaton Socon

Patford Bramford Bridge Greater Gabbard 500MW Sundon East Claydon Pelham Braintree Wymondley Leighton Buzzard Greater Gabbard 2nd part Rassau Walham Waltham Rye House Cross Rhigos Imperial Brimsdown Park Gunfleet Sands I&II Cowley Swansea North Watford Elstree Highbury Pembroke Amersham Main Hackney London Array Cilfynydd Culham Tottenham Redbridge Rayleigh Main Baglan Bay Mill Hill Warley To Netherlands Upper Boat Uskmouth Minety Didcot Willesden Margam Iron Acton Coryton Iver Kensal Green West Ham Alpha Steel Whitson Barking Pyle Ealing Pudding St Johns City Rd Mill Grain Hurst West Thurrock Tilbury Seabank Wood Kentish Flats Wimbledon New Cross Northfleet Thanet Tremorfa Laleham Littlebrook Kingsnorth East Singlewell Kemsley Cleve Hill Aberthaw Cardiff Melksham Chessington East Bramley West Weybridge BeddingtonRowdown Fleet Canterbury North Hinkley Point Sellindge Bridgwater Alverdiscott Bolney Taunton Nursling Dungeness Mannington Marchwood Lovedean Ninfield Axminster To France Fawley Botley Wood Exeter

Chickerell Rampion

Langage Abham

Indian Queens Landulph 4 Figure A3: GB Transmission System Boundaries

B0 400kV Substations 275 kV Substations B0 132kV Substations

400kV Circuits 275kV Circuits 220kV Circuits 132kV Circuits Western HVDC Link Interconnectors

Dounreay Thurso

Mybster Major Generating Sites Including Pumped Storage

Cassley Moray Firth B1 Stornoway Dunbeath Connected at 400kV Connected at 275 kV Lairg B1a Hydro Generation Harris Brora Shin Loch Buidhe B2a

Grudie Bridge Mossford

Fyrish Alness Corriemoillie Fraserburgh Luichart Orrin Elgin Macduff St. Fergus Ardmore Deanie Keith Culligran Dingwall Strichen Nairn Aigas Kilmorack Inverness Blackhillock Dunvegan Peterhead Beauly Knocknagael Fasnakyle Dyce B2a Kintore Persley Glen Broadford Morrison Woodhill Willowdale Caennacroc Foyers Clayhills Fort Augustus Boat of Quoich Garten Tarland Glendoe Craigiebuckler Redmoss Invergarry

Kinlochleven Tummel Fiddes

Fort William Errochty Power Station Errochty B2 Rannoch Clunie Firth of Forth Tummel Bridge Tealing Dudhope Arbroath B4 Lochay Cashlie Lyndhurst Milton of Craigie Taynuilt Killin Charleston Dalmally Finlarig Dudhope Cruachan Burghmuir Glenagnes St. Fillans B5 Nant Clachan Inverarnan B1 SCOTTISH HYDRO-ELECTRIC Cupar Inveraray Sloy TRANSMISSION Glenrothes Leven B1a Devonside Westfield Redhouse Whistlefield Kincardine Stirling Dunfemline Glenniston Helensburgh Denny Mossmorran Port Ann Longannet Inverkeithing Dunoon Bonnybridge Grangemouth Shrubhill Cockenzie Dunbar Spango Cumbernald BroxburnTelford Rd. Portobelllo Bainsford Gorgie Valley Strathleven Windyhill Bathgate Crystal Rig Torness Whitehouse B6 B2 Erskine Lambhill Devol Easterhouse Fallago Smeaton Moor Coatbridge Livingston Newarthill Currie Kaimes Crossaig Hunterston Neilston Clydes Mill Black Law Extension NorthHunterston Strathaven Dunlaw Extension Berwick East Black Law Marshall Meadows Busby East Kilwinning Whitelee Wishaw B3b Hunterston Kilmarnock Kilbride Saltcoats Town Whitelee ExtnSouth Linnmill Eccles Meadowhead SP TRANSMISSION LTD Carradale Galashiels Kilmarnock Coalburn Ayr South Clyde (North) Dogger Bank Coylton Clyde (South) Elvanfoot Hawick New Cumnock Maybole Moffat Auchenwynd Black Hill Glenglass B3b Hadyard Dun Hill Harestanes Kendoon Ewe Hill CarsfadBlackcraig Markhill To Northern Ireland Glenlee Gretna Blyth Arecleoch Kilgallioch Earlstoun Dumfries Ecclefechan B4 Auchencrosh Fourstones Newton Stewart Tynemouth Chapelcross Harker South Shields Stella West Tongland West Boldon Glenluce B5 Offerton Hawthorne Pit Hartmoor Spennymoor Hartlepool Saltholme Tod Point Teesside Norton B7 Robin Rigg Greystones Grangetown B6 Lackenby B7 B7a

Hutton B11 Hornsea Ormonde

Walney I & II Quernmore Heysham Osbaldwick B16 Knaresborough West of Duddon Middleton Barrow Bradford Thornton West Kirkstall Skelton Poppleton Creyke Beck Westermost Rough Stanah Padiham Grange Monk Fryston Saltend North Hedon Penwortham Drax Humber Gateway Elland Saltend South Eggborough B7a Rochdale Ferrybridge B11 To Ireland To Ireland Washway Keadby Humber Refinery B8 B16 Burbo Bank Farm Kearsley Templeborough Thorpe EC1 Whitegate Killingholme Triton Knoll Kirkby West Marsh South Stalybridge Melton Humber Grimsby West Gwynt y Mor Carrington Pitsmoor West Wylfa Rainhill Stocksbridge Aldwarke Bank North Hoyle Winco Bank Burton B9 Bredbury Neepsend Thurcroft Rhyl Flats Rocksavage Fiddlers Daines Sheffield City Ferry Cottam Brinsworth Inner Dowsing Race Bank Dudgeon Flintshire Frodsham Jordanthorpe Bodelwyddan Bridge Macclesfield Norton Lees EC5 Pentir Capenhurst Chesterfield Lincs High Dinorwig Connah’s Quay South Manchester Marnham Sheringham Shoal East Anglia Staythorpe Lynn Legacy EC3 Ffestiniog Cellarhead Stoke Bardolph Bicker Fen Ratcliffe NW1 Willington on Soar Trawsfynydd B17

Drakelow Walpole Rugeley Spalding North Necton Ironbridge Sutton Norwich Main Bushbury Bridge Scroby sands NW2 Willenhall Shrewsbury Penn Bustleholm Enderby Hams Hall Ocker Hill Nechells Coventry Oldbury NW3 Kitwell Berkswell

Burwell Main Sizewell NW4 Feckenham Grendon Bishops Wood Eaton B8 Socon B9 Patford Bramford Bridge LE1 Greater Gabbard 500MW Sundon East Claydon Pelham Braintree B12 Wymondley Leighton B15 Buzzard Greater Gabbard 2nd part Rassau Walham Waltham Rye House Cross Rhigos Imperial Brimsdown Park B14 Gunfleet Sands I&II Cowley Swansea North Watford Elstree Highbury Pembroke Amersham Main Hackney London Array Cilfynydd Culham Tottenham Redbridge Rayleigh Main SW1 Baglan Bay Mill Hill Warley To Netherlands Upper Boat Uskmouth Minety Didcot Willesden Margam Iron Acton Coryton Alpha Steel Iver Kensal Green West Ham Pyle Whitson Barking Ealing Pudding SC2 St Johns City Rd Mill Grain Hurst West Thurrock Tilbury Seabank Wood Kentish Flats Wimbledon New Cross Northfleet Thanet Tremorfa Laleham Littlebrook Kingsnorth East Singlewell Kemsley Cleve Hill Aberthaw Cardiff Melksham Chessington SW1 East Bramley West Weybridge BeddingtonRowdown SC1 Fleet Canterbury EC5 North B10 Hinkley Point Sellindge Bridgwater B13 Alverdiscott Bolney Taunton Nursling Dungeness Mannington Marchwood Lovedean Ninfield Axminster To France SC1 Fawley Botley Wood B15 Exeter Chickerell LE1 Rampion B10 B12 Langage Abham SC2 Indian Queens Landulph

B13 NATIONAL GRID SP TRANSMISSION SHE TRANSMISSION FE A TAY PORT N R FOR

SU D N I ED DINOR B N N CROSSAIG H NOR MOYLE A U O R U VER U U I N FFESTINIOG HARRIS D C S C O T

I C N I A ARECLEOCH N BLACKCRAIG V L

H T H AR A W H T N B T H EGA TH R E D E E AR N AN I U WIG A F L R R N N O TH LI C S AD A T E N R T R AM KILGALLIOCH BLACKHIL E Y L KILMORACK O D CULLIGRAN O A A R E K N S YR L S N VE ILW H E KI T DEANIE E PENTIR O AIGAS W LMAR N AL N CS PEMBROKE I MA N T H SHREWSBUR 2 VERDISCOTT 1 O MARGREE N U N R I N INDIAN QUEENS N TRA

N IRONBRIDGE K S T GLEN ME 1 G OC E T BA BAGLAN H BISHOPS E R ILL AD WSFYNYDD W S Y 2 K T WOOD MARGAM T BODEL FFESTINIOG A LU FA OW WYLF O BIRKENHEAD KIRKBY R W OWN PYLE N T C H EAST SN H DRIVE LISTER C Y MOSSFORD CUMNOCK HEAD LUICHAR E NEW U D I OYL GLEN GLEN STLEFI WYDDAN 2 N A 1 U SLO A D LANDULPH T KYLE BRIDGE GRUDIE N ORRIN EV E O T R 1 Y ON O OLMOOR D K 3 KI 1 2 S LEE D 1 2 H N EN SW OE 2 T E T L EV AD FOR BRIDGE FLINTSHIRE O LD M W ABER 1 D N ANSEA AR OLMOOR O I Y 1 N 1 T 2 1 1 LANGAGE 1 O C AR 2 2 T ON D

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CASSLEY A 1 2 2 NOR H I LA GU BUSHBUR L H K CAPENHURST PENN CARDIFF C D EAST YB T LAIRG ILL W L E BEA

AUNT S AR H ALMA UPPER BOA N ABHAM 2 1 L ST 2 O OU AN E D 1 TH

1 N LE N 1 2 U

U AN TH S T L Fyrish 2 DEESIDE 1 S 2 ON 1 LL RHIGOS B Y 2 EXETER USKMOUTH D F W 1 U 1 LEGACY W Y ARM Y EIRGRID U R ASHW N FRODSHAM KITWELL M G I EI N CILFYNYDD WILLENHALL TREMORF 2 H F 2 D LST 2 3 2 R 1 2 1 2 C Y WHITSON W I E H H A ES Loch Buidhe ALNESS AST ON 1 H A Y I AXMINSTER L H PE I 2 1 1 1 D 2 BR K L T 4 ER 1 AGGS GI RAINHILL R N 2 E

1 L KI U O L A ST F C WIND F F S A ROCKSA FIDDLERS FERR E M EH C LBR ARR FN R KI GOV E ANAH C K HINKLEY POINT O 2 N

RASSAU FO N H EAD OC E 2 1 Harestanes R RUGELEY CARRINGT S C HILL OCKER E AG A I SH OLDBUR P CONNAH’S X OA S CHICKERELL D Y H HEYSHAM CELLARHEAD YER P AI A ARM T K E S BU QUA BRACO AR E N I A

SL N D P L V E BRIDGW MIDDLET A S AGE ER LOTTE OU L TUMMEL S 2 INVERNESS 1 E 2 1 BRORA R BY Y 2 NAIRN C Y GAR BOA E K STR IRON R TH W LAMB O Y D L OC 2 P IMPERIAL ON EA A BUSTLEHOLM ALLAS VA ES FECKENHAM 2 ARK W 1 T TEN L A MANNINGT OF H STR B ST H SEABANK N T A TH 2 ACT TY ON U H PORT

I TER 1 FOOT G 2 2 1 TELEE 1 1

KEARSLEY W R ILL DAINES K A EO ELGIN PENWOR 1 EET N MARCHWOOD GLEN ILBR ALHAM V ON D E R DRAKELOW A

2 N D G L 1 F 2 DENNY I M U E D A 2 1 FAR ON

A N E WLEY S 1 MOFF R GR D T MACCLESFIELD THAM DUNBEA N ROCHDALE R NECHELLS AS C 1 2 O C E ETN MANCHESTER SOUTH NURSLING L B KE C MELKSHAM ET LYD P MYBSTER A LAC A K 2 MINETY 2 ADIHAM S 1 ITH T A WHITEGA LON E' TH K S 1 2 1 H 1 2 HUTT MIL I GAN WILLINGT L 2 LOC ST C C WOOD BOTLEY HARKER L W L THURSO L 1 AL N TE Y ON Y I K 1 ET 2 SH D D YBRIDGE 2 1 2 E E D A

BERKSWELL N N O ON EAST SOU W ELLAND E HALL HAMS OR EWAR U BRAMLEY AS 1 1 2 LOVEDEAN K C CULHAM JET FLEET N COWLEY BLAC IN TH DIDCOT OA TH R BRADFORD WEST T H EA ER COVENTR T KI A TBR 1 2 OR BREDBUR TH B W 2 1 H Y K N 2 1 L O L C I E I LL AC C A I U C AR D K W S U GE FOURST MAIN AMERSHAM K E FETTERESSO R D BON L NEEPSEND Y I R A WEYBRIDGE WEST N SHEFFIELD CITY Y W I E E LALEHAM N YB ONES S R IGH FERR 2 I 2 C D GALA PITSMOOR 1 KAI 1 1 O GE KIRKST TH 1 U 2 CHESSINGT YBRIDGE 1 G ME P ST GRANGE SKEL I SPENNYMOOR TA NOR LL CLA EAST 2 SH R AR 2 W 2 IVER A OCKSBRIDGE S R N E D IE BUZZARD LEIGHT

1 2 3

ALL YDON LAN G STFIE TEALI T A T EWAR EALING 1 L BRIDGE P E 1 2 ON ON LEES N 1 S A M W GU TFORD 2 D O BOLNEY H U N L 1 EXTENSION DUNLA S 2 I ON ON

2 PERSLEY T SOUTH W D TE PLA G FR H ENDERBY 1 STI A MONK KNARESBOROUGH 1 2 2 1 H TFORD YST WIMBLEDON C OUSE BU 2 TEMPLEBOROUGH 1 R 1 E F ELSTREE W LIN JORDANTHORPE 2 G ON ALLAGO R SH WILLESDEN L SMEA G GREEN KENSAL E G 1 2 2 H R N 2 1 2 STELLA 1 WEST MU MILL ALDW R U C 1 3 2 FI E C 1 BR O 1 1 BH 1 2 1 1 R T POPPLET 2 C RYS PORT D T I RIG 2 WEST ON R A NEW CROSS H BEDDINGT C C E HILL I D L P I E C W H L GI 1 ARKE ES 2 L 2 ETER 2 2 OSBALDWICK E S D SUNDON 1 T H A E E AL S EV 1 I R O M STFIE 1 B N MEL 2 ON SOAR RA LES 1 B BL WOOD ST O 1 U

NINFIELD ON BRIMSDOWN

ELLO C GR H S ON C YTH TCLIFFE . JOHN’S 1 S O 2 AB EAD K 2 T T S M C ON L I L ON ON Figure 2 D W I CROSS O D E D ER KE 1 2 R BRINSWOR AL R E MOBIL ST R HIGHBUR 2 N N THURCROFT 1 2 A 1 THAM 2 THORNT GRENDON . FERGUS ETH ZI 1 2 N T 1 2 R 2 1 E GRANGE PETERHEAD CHESTERFIELD OR EGGBOROUGH HURST CITY YE HOUSE Y W 1 TYNEMOUTH N 1 2 LEVE ES ST 2 2 1 1 Y ROAD 1 ON TH 2 4 . FERGUSGAS S AR STRICHEN 1 3 MILL PUDDING 2 2 GLEN 1 BARDOLPH ST WYMONDLEY MAIN 2 N 2 B ROWDOWN 1 OKE 1 MI R NOR 2 DUNGENESS E DRAX O L 3 N 1 1 2 1 FRASERBURGH A T 1 I HACKNEY 2 ST 2 ON T T A4: GBExistingT H THORPE ON MARSH 2 2 1 ON OFC HAM WEST SHIELDS SOUTH MARNHAM SOCON EA C R HIGH U 2 T ED R LITTLEBROOK ON P REDBRIDGE A AR 2 1

W PELHAM 1 H 2 IGI LACKENBY 1 OU ARLEY 1 2 BRAINTREE GREYST 1 2 E 1 SE BARKING SELLINDGE BOLDON WEST KEADBY 2 1 2 ST 2 1 BECK CREYKE A ONES YTHORPE T 3 (270kV DC) SELLINDGE B OD POINT WEST THURROCK BUR R MAIN TILBUR 1 E deF 1 YHALL 1 A 1 2 1 WELL 2

2 2 EAST NOR 2 Y OFFER 1 COTT SINGLEWELL KILLINGHOLME THFLEET T ON 2 AM 1 NOR SAL BRAMFORD 2 SAL WEST NOR SP TEND KEMSLEY TH REFINER HUMBER CREEK DAMHEAD ALDING THOLME TH BUR CANTERBUR NOR 2 1 2 KINGSNOR RA T 2 HAR Y TH ON YLEIGH MAIN GRAIN 1 W NOR MAIN TLEPOOL ALPOLE 1 SAL ransmission System HEDON BICKER FEN MEDW WICH Y TH NECT TEND 2 COR BRIDGE SUTT BANK HUMBER SOUTH 1 A SIZEWELL YT Y ON BRITNED HA PIT HAR ON CLEVE HILL GRIMSBY ON WEST WTHORN are indicatedonthisdiagram Note1: Notallradial132kVcircuits TMOOR Legend 132kV Substation 275kV Substation 400kV Substation W 132kV Circuit 220kV Circuit 275kV Circuit 400kV Circuit estern HVDCLink 5 NATIONAL GRID SP TRANSMISSION SHE TRANSMISSION M7 FE M6 A N3 TAY M8 PORT N T3 R FOR

SU D N I ED DINOR B N N CROSSAIG H NOR MOYLE A U O R U VER U U I N FFESTINIOG HARRIS D C S C O T

I C N I A ARECLEOCH N H6 BLACKCRAIG V L

H T H AR A W H T L2 N B T H EGA TH H1 L5 R E D E E AR N AN I U WIG A F L R R N N O TH LI C S AD A T E N R T R AM KILGALLIOCH F6 BLACKHIL E Y L KILMORACK O D CULLIGRAN O A A R E K N N1 S YR L S N VE ILW H E KI T DEANIE E PENTIR O AIGAS W LMAR N AL N CS PEMBROKE I MA N T H SHREWSBUR 2 VERDISCOTT 1 O MARGREE N U N R I N INDIAN QUEENS N TRA

N IRONBRIDGE K S T GLEN ME 1 G OC E T BA BAGLAN H BISHOPS E R ILL AD WSFYNYDD W S Y 2 K T WOOD MARGAM T BODEL FFESTINIOG A T1 LU FA OW WYLF O BIRKENHEAD KIRKBY R W OWN PYLE N T C H EAST SN H DRIVE LISTER C Y MOSSFORD CUMNOCK HEAD LUICHAR E NEW U D I OYL GLEN GLEN STLEFI WYDDAN 2 N A 1 U SLO A D LANDULPH T KYLE BRIDGE GRUDIE N ORRIN EV E O T R 1 Y ON O OLMOOR D K 3 KI 1 2 S LEE D 1 2 H N EN SW OE 2 T E T L EV AD FOR BRIDGE FLINTSHIRE O LD M W ABER 1 D N ANSEA AR OLMOOR O I Y 1 N 1 T 2 1 1 LANGAGE 1 O C AR 2 2 T ON D

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1 N LE N 1 2 U

U AN TH S T L Fyrish 2 DEESIDE 1 S 2 ON 1 LL RHIGOS B M5 Y 2 M4 EXETER USKMOUTH D F W 1 U 1 LEGACY W Y ARM Y EIRGRID U R ASHW N FRODSHAM H2 KITWELL M G I EI N CILFYNYDD E8 WILLENHALL TREMORF 2 H F 2 D LST 2 3 2 R 1 2 1 2 C Y WHITSON W I E H H A ES Loch Buidhe ALNESS AST ON 1 H A Y I AXMINSTER L H PE I 2 1 1 1 D 2 BR K L T 4 ER 1 AGGS GI RAINHILL R N 2 E

1 L KI U R5 O L A ST F C WIND F F S A ROCKSA FIDDLERS FERR E M EH C LBR ARR FN R KI GOV E ANAH C K HINKLEY POINT O 2 N

RASSAU FO N H EAD OC E 2 1 Harestanes R RUGELEY CARRINGT S C HILL OCKER E AG A I SH OLDBUR P CONNAH’S X OA S CHICKERELL D Y H HEYSHAM CELLARHEAD YER P AI A ARM T K E S BU QUA BRACO AR E N E1/E6 I A

SL N D P L V E BRIDGW MIDDLET A N8 S AGE E7 ER LOTTE OU L TUMMEL S 2 INVERNESS 1 E 2 1 BRORA R BY Y 2 NAIRN C Y GAR BOA E K STR IRON R G7 TH W LAMB O G5 Y D L OC 2 P IMPERIAL ON EA A BUSTLEHOLM ALLAS VA ES FECKENHAM 2 ARK W 1 T TEN L A MANNINGT OF H STR B ST H SEABANK N T A TH 2 ACT TY ON U H PORT

I N6 TER 1 FOOT G 2 2 1 TELEE 1 1

KEARSLEY W R ILL DAINES K A EO ELGIN PENWOR 1 EET N MARCHWOOD GLEN ILBR ALHAM V ON G6 D E N4 R DRAKELOW A

2 N D G L 1 F 2 DENNY I M G1 U E D A 2 1 FAR ON

A N E WLEY S 1 L5 MOFF R GR R4 D T MACCLESFIELD THAM DUNBEA N ROCHDALE R NECHELLS AS C 1 2 O C E ETN MANCHESTER SOUTH NURSLING L B KE C MELKSHAM ET LYD P MYBSTER A LAC A T4 K 2 MINETY 2 ADIHAM S 1 ITH T A WHITEGA LON E' S5 TH S6 K S 1 2 1 H 1 2 HUTT R6 MIL I GAN WILLINGT L 2 N5 LOC ST C C WOOD BOTLEY HARKER L W L THURSO L 1 AL N TE Y ON Y I K 1 ET 2 SH D D YBRIDGE 2 1 2 E T6 N2 E D A

B2 BERKSWELL N N O ON EAST SOU W ELLAND E HALL HAMS OR EWAR U BRAMLEY AS 1 1 2 LOVEDEAN K D6 N7 C CULHAM JET FLEET N COWLEY BLAC B3 B4 IN TH DIDCOT OA TH R BRADFORD WEST T H EA ER COVENTR T KI A TBR 1 2 OR BREDBUR TH B W 2 1 H Y K N 2 1 L O L C I E I LL AC C A I U C AR D Q8 K W S U GE FOURST MAIN AMERSHAM K E FETTERESSO R D BON L NEEPSEND Y I R A L3 WEYBRIDGE WEST N SHEFFIELD CITY Y W I T5 E E LALEHAM N YB ONES P1 S R IGH FERR 2 I 2 C D GALA PITSMOOR 1 KAI 1 1 O GE KIRKST TH P5 1 U 2 CHESSINGT YBRIDGE 1 G ME P ST GRANGE SKEL I SPENNYMOOR TA NOR LL CLA EAST 2 SH R AR 2 WINCOBANK W 2 IVER A OCKSBRIDGE S R N E D IE BUZZARD LEIGHT

1 2 3

ALL YDON LAN G STFIE TEALI T A T EWAR EALING 1 L BRIDGE P E 1 2 ON ON LEES N 1 S A M W GU TFORD 2 D O BOLNEY A6 H U N L 1 EXTENSION DUNLA S 2 I ON ON

2 PERSLEY T SOUTH W D TE PLA G FR H ENDERBY 1 STI A MONK D4 KNARESBOROUGH 1 2 2 1 H TFORD YST WIMBLEDON C OUSE BU 2 TEMPLEBOROUGH 1 R 1 E F ELSTREE W LIN JORDANTHORPE 2 G ON ALLAGO R SH WILLESDEN L A7 SMEA G GREEN KENSAL E G A4 P2 1 2 2 H R N 2 1 2 P3 STELLA 1 WEST B1 MU MILL ALDW R U C 1 3 2 FI E C 1 BR O 1 1 BH 1 2 1 1 R T POPPLET 2 C RYS PORT D T I RIG 2 WEST ON R A NEW CROSS H BEDDINGT C C E HILL I D L8 L P I E C W H L GI 1 ARKE ES 2 L 2 ETER 2 2 OSBALDWICK E S D SUNDON 1 T H A E E AL S EV 1 I R O M STFIE 1 B N MEL 2 ON SOAR RA LES 1 B BL WOOD ST O 1 U

NINFIELD ON BRIMSDOWN

ELLO C GR H S ON C YTH TCLIFFE . JOHN’S 1 S O 2 AB EAD K 2 T T S M C ON L I L ON ON Figure 2 D W I Q5 CROSS O D E Q6 D ER Q7 KE 1 2 R BRINSWOR AL R E MOBIL ST R HIGHBUR 2 N N THURCROFT 1 2 A 1 THAM 2 THORNT GRENDON . FERGUS ETH ZI J6 1 2 N T 1 2 A8 L7 R 2 1 E GRANGE PETERHEAD CHESTERFIELD OR EGGBOROUGH HURST P4 CITY YE HOUSE Y W 1 TYNEMOUTH N 1 2 LEVE ES ST 2 2 1 1 Y ROAD 1 ON TH 2 4 . FERGUSGAS S AR STRICHEN 1 3 MILL PUDDING 2 2 GLEN 1 BARDOLPH ST A9 WYMONDLEY MAIN 2 N 2 B ROWDOWN 1 OKE 1 T2 MI R NOR 2 DUNGENESS E DRAX O L 3 N 1 1 2 1 FRASERBURGH A P6 J4 T 1 I HACKNEY 2 A3 ST 2 ON T T A5: GBT H THORPE ON MARSH 2 2 1 ON OFC HAM WEST SHIELDS SOUTH MARNHAM SOCON EA D5 C R HIGH U 2 T ED C4 R LITTLEBROOK ON P REDBRIDGE A AR 2 1

W PELHAM 1 H 2 IGI LACKENBY 1 OU ARLEY 1 2 BRAINTREE C6 GREYST 1 2 E A1 1 SE BARKING SELLINDGE BOLDON K2 WEST KEADBY 2 1 2 ST 2 1 BECK CREYKE A ONES YTHORPE T 3 (270kV DC) SELLINDGE B OD POINT WEST THURROCK C9 BUR R MAIN TILBUR 1 E deF 1 YHALL 1 A K5 1 J7 2 1 WELL 2 ransmission SystemETYSZones

2 2 EAST NOR 2 Y OFFER J8 1 COTT SINGLEWELL C1 KILLINGHOLME THFLEET C2 T ON 2 AM 1 NOR SAL J5 BRAMFORD 2 SAL WEST NOR SP TEND KEMSLEY TH REFINER HUMBER CREEK DAMHEAD ALDING THOLME TH BUR CANTERBUR NOR Q4 2 1 2 KINGSNOR RA T 2 HAR Y TH ON YLEIGH MAIN GRAIN 1 W NOR MAIN TLEPOOL ALPOLE 1 SAL HEDON BICKER FEN MEDW WICH Y TH NECT TEND 2 COR BRIDGE SUTT BANK HUMBER SOUTH 1 A SIZEWELL C7 YT Y ON BRITNED HA PIT HAR ON CLEVE HILL GRIMSBY ON WEST WTHORN are indicatedonthisdiagram Note1: Notallradial132kVcircuits Q2 TMOOR Legend P8 K6 K1 K4 C3 C5 J1 P7 J3 J2 132kV Substation 275kV Substation 400kV Substation W 132kV Circuit 220kV Circuit 275kV Circuit 400kV Circuit estern HVDCLink 6 7 B0 B0 B1 B1a DOUNREAY Figure A6: GB Transmission System Boundaries

Loch Buidhe MYBSTER GRUDIE DEANIE BRIDGE CASSLEY BRORA DUNBEATH

CULLIGRAN MOSSFORD THURSO LAIRG SHIN

AIGAS LUICHART Fyrish B2a KILMORACK ALNESS ORRIN STRICHEN ST. FERGUS NAIRN ELGIN MOBIL HARRIS KEITH PETERHEAD BEAULY FRASERBURGH DUNVEGAN INVERNESS ST. FERGUS GAS EDINBANE FASNAKYLE PERSLEY PETERHEAD Legend FARR GRANGE BOAT OF GARTEN GLENFARCLAS B2a 400kV Circuit KNOCKNAGAEL B1 BROADFORD GLENDOE CRAIGIEBUCKLER 275kV Circuit BLACKHILLOCK KINTORE TARLAND 220kV Circuit B1a DALLAS FIDDES FOYERS

SHE TRANSMISSION 132kV Circuit FORT WILLIAM B2 BRECHIN GRID Western HVDC Link FORT AUGUSTUS 400kV Substation B2 FETTERESSO ARBROATH KILLIN TUMMEL TEALING MILTON OF CRAIGIE 275kV Substation

B3b TAYNUILT DALMALLY 132kV Substation

FERNOCH CRUACHAN ERROCHTY CHARLESTON System Boundaries INVERARAY INVERARNAN COUPAR ANGUS AN SUIDHE BURGHMUIR B4 PORT ANN SLOY LEVEN CUPAR Note1: Not all radial 132kV circuits ABERNETHY BRACO are indicated on this diagram CROSSAIG DUNOON GLENROTHES

B3b HELENSBURGH CARRADALE STRATHLEVEN WESTFIELD B4 WESTFIELD RED HOUSE WHISTLEFIELD LONGANNET WINDYHILL MOSSMORRAN DENNY GLENNISTON DRUMCHAPEL KINCARDINE WINDYHILL STIRLING DEVONSIDE BONNYBRIDGE B5 LAMBHILL ERSKINE PORT DUNDAS

DEVOLMOOR WEST GEORGE STREET PARK GRANGEMOUTH B5 SHRUBHILL HUNTERSTON CHARLOTTE STREET DEWAR PLACE NORTH DALMARNOCK SIGHTHILL EASTERHOUSE DEVOLMOOR PORTOBELLO COATBRIDGE HUNTERSTON CS HUNTERSTON HAGGS ROAD EAST CURRIE WHITEHOUSE CLYDE'S MILL EAST KILBRIDE HUNTERSTON PAISLEY NEWARTHILL GIFFNOCK KILWINNING WHITELEE BLACKLAW MEADOWHEAD KAIMES COCKENZIE BLACKLAW NEILSTON TRANSMISSION BUSBY SMEATON CRYSTAL WHITELEE EXT RIG KILMARNOCK TOWN EAST KILBRIDE SOUTH WISHAW SP TORNESS KILMARNOCK SOUTH STRATHAVEN FALLAGO

DUNLAW AYR COALBURN EXTENSION

KILGALLIOCH HADYARD HILL CLYDE NORTH ELVANFOOT AUCHENCROSH CLYDE SOUTH ECCLES MAYBOLE Harestanes MOYLE MOFFAT MARK HILL COYLTON ARECLEOCH GALASHIELS NEW BLACKHIL CHAPELCROSS CUMNOCK GRETNA HAWICK BLACKCRAIG MARGREE GLENLUCE KENDOON DUMFRIES B6

FOURSTONES TYNEMOUTH SOUTH WEST OFFERTON NEWTON STEWART GLENLEE TONGLAND 1 BLYTH 1 SHIELDS BOLDON B6 1 2 2 2 HARKER STELLA HAWTHORN B7 WEST PIT B11 2 1 HARTMOOR SPENNYMOOR LACKENBY B16 1 2 SALTHOLME MIDDLETON HUTTON 2 B7a 2 HEYSHAM 1 WASHWAY TOD POINT HARTLEPOOL 2 1 1 FARM 2 1 STANAH B7 1 2 GREYSTONES HEDON B7a 1 1 BRADFORD NORTON KIRKSTALL SALTEND WEST 2 2 NORTH PENWORTHAM THORNTON KNARESBOROUGH CREYKE SALTEND 1 BECK HUMBER 1 2 1 2 3 2 SKELTON REFINERY PADIHAM 2 SOUTH KIRKBY 3 1 2 RAINHILL GRANGE OSBALDWICK 1 HUMBER 2 1 KEADBY KILLINGHOLME BANK 2 1 POPPLETON EC1 2 1 3 1 2 LISTER ELLAND FERRYBRIDGE 1 DRAX 3 4 GRIMSBY DRIVE FIDDLERS 2 1 1 WEST FERRY 2 2 1 2 1 ROCHDALE 3 2 B11 CAPENHURST KEARSLEY MONK WEST BURTON 2 2 2 1 FRYSTON NW4 1 2 EGGBOROUGH BIRKENHEAD 2 1 1 2 B8 1 NW3 1 2 1 WHITEGATE 1 2 NW2 1 1 2 1 2 CARRINGTON 2 COTTAM NW1 STALYBRIDGE 1 2 WYLFA NEEPSEND STOCKSBRIDGE THORPE MARSH 1 2 FRODSHAM ROCKSAVAGE WEST MELTON 1 2 SOUTH PITSMOOR NW1 2 1 MANCHESTER 1 2 2 BODELWYDDAN BREDBURY ALDWARKE EIRGRID 1 WINCOBANK 2 PENTIR DAINES THURCROFT 1 2 TEMPLEBOROUGH HIGH 1 CONNAH’S MARNHAM 1 QUAY 2 1 DINORWIG MACCLESFIELD DEESIDE 2 FFESTINIOG FLINTSHIRE 1 NW2 BRIDGE 1 2 2 SHEFFIELD BRINSWORTH CITY WILLINGTON EAST 1 2 FFESTINIOG 1 CHESTERFIELD CELLARHEAD BICKER NORTON LEES NW3 TRAWSFYNYDD JORDANTHORPE 2 FEN 1 2 1 RUGELEY STOKE STAYTHORPE SPALDING GRID NW4 2 DRAKELOW RATCLIFFE SHREWSBURY 1 BARDOLPH NORTH LEGACY 1 ON SOAR B8 IRONBRIDGE 2 B16 2 BUSHBURY 2 B9 SUTTON 1 PENN B17 BRIDGE 2 1 WILLENHALL OCKER COVENTRY EC3 WALPOLE HILL TIONAL 2 1 2 1 RYHALL HAMS EATON HALL ENDERBY SOCON NECTON EC5 KITWELL NA OLDBURY 1 1 2 1 2 BISHOPS 1 NORWICH WOOD 2 2 NECHELLS 2 BURWELL 1 PATFORD GRENDON MAIN BUSTLEHOLM BRIDGE MAIN 2 BERKSWELL EAST 1 SUNDON WYMONDLEY CLAYDON MAIN PELHAM BRAMFORD B17 FECKENHAM 1 2 SIZEWELL EC6 B9 2 1 1 2 WALHAM AMERSHAM RYE HOUSE RASSAU BRAINTREE B12 MAIN LEIGHTON RAYLEIGH MAIN EC5 BUZZARD PEMBROKE ELSTREE 2 COWLEY 1 1 SW1 1 1 LE1 1 RHIGOS 1 2 2 1 2 2 2 2 WARLEY 2 CORYTON B15 SW2 IVER TILBURY SWANSEA NORTH CILFYNYDD CULHAM JET WATFORD WALTHAM SOUTH CROSS 1 2 1 1 2 MILL HILL BAGLAN BRIMSDOWN 1 2 4 3 BAY 2 1 2 UPPER SW2 BOAT IMPERIAL PARK MARGAM EALING REDBRIDGE 1 2 WILLESDEN MEDWAY DIDCOT 2 2 2 2 2 2 MINETY USKMOUTH 1 W 1 1 E1 1 1 2 PYLE IRON ACTON HACKNEY 1 2 1 2 LALEHAM 2 1 1 2 CARDIFF BRITNED 2 2 1 EAST 1 GRAIN 2 1 WEST 2 1 PUDDING 2 1 KENSAL HIGHBURY HAM NORTHFLEET 1 2 MILL GREEN EAST BRAMLEY 1 SW1 WHITSON 1 KINGSNORTH 1 2 2 1 ST. JOHN’S 2 CITY ROAD WEST 1 2 THURROCK TREMORFA WIMBLEDON WOOD SINGLEWELL B10 2 1 BARKING 1 2 MELKSHAM 1 1 HINKLEY SEABANK 2 1 WEST ABERTHAW POINT 1 1 WEYBRIDGE 2 2 HURST B13 ALVERDISCOTT NEW CROSS LITTLEBROOK DAMHEAD TAUNTON FLEET 1 2 BRIDGWATER 2 CREEK SC1 2 1 1 2 BEDDINGTON 2 3 B14/B14e KEMSLEY 2 1 1 2 1 AXMINSTER 2 2 MANNINGTON 2 1 2 NURSLING 1 1 ROWDOWN INDIAN CHESSINGTON QUEENS 2 1 LOVEDEAN 1 EXETER SELLINDGE B SC2 LANDULPH CHICKERELL CLEVE BOTLEY BOLNEY DUNGENESS 2 HILL MARCHWOOD 1 2 2 2 2 ABHAM WOOD SC1 SELLINDGE A 1 LANGAGE 2 1 NINFIELD 1 1 CANTERBURY FAWLEY NORTH B15 E de F LE1 SC2 B10 (270kV DC) B13 B12 8

DOUNREAY 2 x -60MVAr Figure A7: GB Reactive Compensation Plant

Loch Buidhe MYBSTER GRUDIE DEANIE BRIDGE CASSLEY BRORA DUNBEATH

CULLIGRAN MOSSFORD THURSO LAIRG SHIN

AIGAS LUICHART Fyrish KILMORACK ALNESS ORRIN STRICHEN ST. FERGUS NAIRN ELGIN MOBIL HARRIS KEITH PETERHEAD BEAULY FRASERBURGH

DUNVEGAN 1 x -150/+150MVAr INVERNESS ST. FERGUS GAS 2 x 45MVAr EDINBANE FASNAKYLE 2 x -90MVAr PERSLEY PETERHEAD Legend FARR GRANGE WIND FARM BOAT OF GARTEN GLENFARCLAS 400kV Circuit KNOCKNAGAEL BROADFORD GLENDOE CRAIGIEBUCKLER 275kV Circuit BLACKHILLOCK KINTORE 2 x -100MVAr 2 x -60MVAr TARLAND 220kV Circuit DALLAS FIDDES FOYERS

SHE TRANSMISSION 132kV Circuit FORT WILLIAM BRECHIN GRID Western HVDC Link FORT AUGUSTUS 4 x -60MVAr 1 x -75/225MVAr 400kV Substation FETTERESSO 2 x 45MVAr ARBROATH KILLIN TUMMEL 2 x -30MVAr TEALING MILTON OF CRAIGIE 275kV Substation

TAYNUILT DALMALLY 132kV Substation 1 x -100MVAr FERNOCH CHARLESTON SVC CRUACHAN ERROCHTY MSC INVERARAY INVERARNAN COUPAR ANGUS Reactor AN SUIDHE Series Capacitor BURGHMUIR

PORT ANN SLOY LEVEN CUPAR Note1: Not all radial 132kV circuits ABERNETHY BRACO are indicated on this diagram CROSSAIG GLENROTHES 2 x -60MVAr DUNOON HELENSBURGH Note2: Reactive compensation plants CARRADALE at the HVDC terminals are not listed STRATHLEVEN WESTFIELD WESTFIELD on this diagram 2 x 225MVAr RED HOUSE WHISTLEFIELD 1 x 150MVAr LONGANNET WINDYHILL MOSSMORRAN DENNY GLENNISTON DRUMCHAPEL KINCARDINE WINDYHILL STIRLING DEVONSIDE 1 x -60MVAr BONNYBRIDGE LAMBHILL ERSKINE PORT DUNDAS

DEVOLMOOR WEST GEORGE STREET 2 x -60MVAr BRAEHEAD PARK GRANGEMOUTH 2 x -60MVAr SHRUBHILL HUNTERSTON CHARLOTTE STREET DEWAR PLACE NORTH DALMARNOCK SIGHTHILL 2 x -60MVAr EASTERHOUSE 2x-60MVAr DEVOLMOOR PORTOBELLO GOVAN COATBRIDGE HUNTERSTON CS HUNTERSTON HAGGS ROAD EAST CURRIE WHITEHOUSE CLYDE'S MILL EAST KILBRIDE HUNTERSTON PAISLEY NEWARTHILL GIFFNOCK KILWINNING WHITELEE BLACKLAW MEADOWHEAD 1 x -60MVAr KAIMES COCKENZIE BLACKLAW 1 x 225MVAr NEILSTON TRANSMISSION 1 x -50MVAr BUSBY SMEATON 1 x -60MVAr CRYSTAL WHITELEE EXT RIG KILMARNOCK TOWN 1 x -60MVAr EAST KILBRIDE SOUTH WISHAW SP TORNESS KILMARNOCK SOUTH STRATHAVEN 1 x -60MVAr FALLAGO 2 x -150MVAr 1 x -60MVAr DUNLAW AYR COALBURN EXTENSION 1 x -60MVAr KILGALLIOCH HADYARD HILL 1 x -60MVAr CLYDE NORTH ELVANFOOT AUCHENCROSH 1 x 225MVAr CLYDE SOUTH ECCLES MAYBOLE Harestanes MOYLE MOFFAT MARK HILL COYLTON 2 x 442MVAr ARECLEOCH 1 x -60MVAr 1 x 225MVAr 1 x -60MVAr GALASHIELS 1 x -60MVAr 1 x 560MVAr NEW BLACKHIL CHAPELCROSS CUMNOCK GRETNA HAWICK BLACKCRAIG MARGREE GLENLUCE KENDOON DUMFRIES 1 x 560MVAr 1 x -60MVAr FOURSTONES 2 x 150MVAr TYNEMOUTH SOUTH WEST OFFERTON NEWTON STEWART GLENLEE TONGLAND 1 BLYTH 1 SHIELDS BOLDON 1 2 2 2 1 x 60MVAr HARKER STELLA HAWTHORN 2 x -75/+150MVAr 2 x 225MVAr 3 x 225MVAr WEST PIT 1 x 150MVAr 1 x -100MVAr 2 1 HARTMOOR LACKENBY SPENNYMOOR SALTHOLME MIDDLETON 1 2 3 x 20MVAr HUTTON 1 x -60MVAr 1 x 225MVAr 2 2 x 35% 2 HEYSHAM 1 WASHWAY TOD POINT HARTLEPOOL 2 1 1 FARM 2 1 STANAH 1 x 60MVAr 1 2 1 x 150MVAr 2 x -60MVAr 1 x -45/+45MVAr 2 x -60MVAr GREYSTONES HEDON 1 1 BRADFORD NORTON 2 x -100MVAr KIRKSTALL SALTEND WEST 3 x 20MVAr 2 2 NORTH PENWORTHAM THORNTON KNARESBOROUGH CREYKE SALTEND 1 x -60MVAr 1 BECK HUMBER 1 2 1 2 3 2 SKELTON REFINERY PADIHAM 2 SOUTH KIRKBY 3 1 2 RAINHILL GRANGE OSBALDWICK 4 x 45MVAr 1 4 x 45MVAr 3 x 60MVAr HUMBER 2 1 1 x 150MVAr KEADBY KILLINGHOLME BANK 2 1 1 x -100MVAr POPPLETON 2 x -60MVAr 2 1 3 1 2 LISTER ELLAND FERRYBRIDGE 1 DRAX 3 4 1 x -60MVAr GRIMSBY DRIVE FIDDLERS 1 2 1 1 x -100MVAr WEST FERRY 2 2 1 3 x 60MVAr 2 1 ROCHDALE 1 x 150MVAr 3 1 x -200MVAr 2 CAPENHURST KEARSLEY MONK WEST BURTON 2 2 2 1 FRYSTON 1 2 EGGBOROUGH BIRKENHEAD 2 1 3 x 60MVAr 1 x 150MVAr 1 2 1 x -60MVAr 1 1 x -60MVAr 1 2 1 WHITEGATE 1 x 150MVAr 1 2 2 x -60MVAr 1 1 2 1 2 COTTAM 1 x 60MVAr CARRINGTON 2 STALYBRIDGE 1 x -200MVAr 1 2 WYLFA NEEPSEND STOCKSBRIDGE 3 x 45MVAr THORPE MARSH 1 2 FRODSHAM ROCKSAVAGE WEST MELTON 1 PITSMOOR 2 SOUTH PITSMOOR 2 x -60 to -30MVAr 2 1 MANCHESTER 1 2 2 1 x -200MVAr BODELWYDDAN BREDBURY ALDWARKE 2 x -60MVAr 1 x -100MVAr EIRGRID 1 WINCOBANK 2 PENTIR DAINES THURCROFT 1 2 TEMPLEBOROUGH HIGH 1 CONNAH’S MARNHAM 1 QUAY 2 1 DINORWIG 1 x -60MVAr MACCLESFIELD DEESIDE 2 FFESTINIOG FLINTSHIRE 1 BRIDGE 1 2 2 x -75/150MVAr 1 x -75/+150MVAr SHEFFIELD 2 2 x 225MVAr 1 x 225MVAr BRINSWORTH CITY 4 x 60MVAr WILLINGTON EAST 1 2 FFESTINIOG 2 x -60MVAr 1 CHESTERFIELD CELLARHEAD BICKER NORTON LEES TRAWSFYNYDD JORDANTHORPE 2 FEN 1 x -75/+150MVAr 1 x -60MVAr 1 x 225MVAr 1 2 1 x -60 to -30MVAr 1 2 x 225MVAr RUGELEY 1 x -200MVAr 1 x 225MVAr STOKE STAYTHORPE SPALDING GRID 2 2 x -60MVAr DRAKELOW RATCLIFFE SHREWSBURY 1 BARDOLPH NORTH LEGACY 1 ON SOAR IRONBRIDGE 2 3 x 60MVAr 2 BUSHBURY 1 x 150MVAr 2 1 x -60MVAr 1 x 225MVAr 3 x 60MVAr 1 x -200MVAr 1 x -60MVAr SUTTON 1 PENN BRIDGE 1 x 0/+60MVAr 2 1 WILLENHALL OCKER COVENTRY WALPOLE HILL 1 x 0/+60MVAr 3 x 60MVAr TIONAL 2 1 1 x 150MVAr 3 x 60MVAr 2 1 RYHALL 2 x -60MVAr HAMS 1 x -60MVAr 2 x 225MVAr 3 x 60MVAr EATON 1 x 20MVAr HALL ENDERBY 4 x 225MVAr SOCON NECTON KITWELL 2 x -60MVAr 1 x 0/+60MVAr 1 x -60MVAr NA OLDBURY 1 1 2 1 2 x 225MVAr 3 x 60MVAr2 BISHOPS 1 x 0/+60MVAr 1 2 1 x -200MVAr 1 x 150MVAr BURWELL NORWICH WOOD 1 x -60MVAr 2 NECHELLS 2 PATFORD MAIN 1 BUSTLEHOLM 2 x -60MVAr GRENDON MAIN 3 x 60MVAr BRIDGE 3 x 60MVAr 2 x 225MVAr 2 BERKSWELL 1 x -50/+225MVAr 2 x 225MVAr 2 x 225MVAr 2 x -75/+150MVAr 1 x -200MVAr 3 x 60MVAr 1 x 60MVAr EAST 1 2 x -60MVAr 2 x -60MVAr 1 x -200MVAr 1 x -75/+150MVAr SUNDON WYMONDLEY 4 x -60MVAr CLAYDON MAIN PELHAM BRAMFORD 1 x -60MVAr FECKENHAM 1 2 SIZEWELL 2 1 1 2 WALHAM AMERSHAM RYE HOUSE RASSAU BRAINTREE MAIN LEIGHTON 2 x 0/+60MVAr RAYLEIGH MAIN BUZZARD 1 x -200MVAr PEMBROKE 1 x -60MVAr 2 COWLEY ELSTREE 2 x -60MVAr 2 x -60MVAr 3 x 60MVAr 1 1 1 1 x -200MVAr 2 x -60MVAr 3 x 60MVAr 1 1 RHIGOS 1 2 1 x -200MVAr 2 x -200MVAr 2 1 2 2 2 2 WARLEY 2 CORYTON IVER 3 x 60MVAr TILBURY SWANSEA NORTH CILFYNYDD CULHAM JET WATFORD WALTHAM 3 x 60MVAr 2 x -60MVAr SOUTH CROSS 1 2 1 1 x -200MVAr 1 2 MILL HILL BAGLAN 4 x -60MVAr BRIMSDOWN 1 2 4 3 BAY 2 1 2 UPPER BOAT IMPERIAL 3x-100MVAr PARK MARGAM EALING 2 x -60MVAr TOTTENHAM REDBRIDGE 1 2 WILLESDEN MEDWAY DIDCOT 2 2 2 2 2 2 1 x 45MVAr MINETY USKMOUTH 1 W 1 1 E1 1 1 2 PYLE IRON ACTON HACKNEY 1 2 LALEHAM 2 2 x 0/+60MVAr 1 2 1 3 x -100MVAr 1 2 CARDIFF 1x-60MVAr BRITNED 2 1 x 45MVAr 2 1 EAST 2 x 0/+60MVAr 2 x -100/150MVAr 1 GRAIN 2 1 WEST 2 1 3 x 60MVAr PUDDING 1 x -200MVAr 2 1 KENSAL HIGHBURY HAM NORTHFLEET 1 2 3 x -200MVAr MILL GREEN EAST BRAMLEY 1 WHITSON 1 KINGSNORTH 1 1 2 2 2 WEST 2 x -200MVAr ST. JOHN’S CITY ROAD 1 x 225MVAr 4 x -30MVAr 1 2 2 x +60MVAr THURROCK TREMORFA WIMBLEDON WOOD 1 x -200MVAr SINGLEWELL 2 1 1 x -200MVAr BARKING 1 2 MELKSHAM 2 x -100M1 VAr 1 2 x -60MVAr HINKLEY SEABANK 3 x 60MVAr 2 1 WEST 1 x -100MVAr ABERTHAW POINT 2 x -60MVAr 2 x 60MVAr 1 1 WEYBRIDGE 2 2 HURST ALVERDISCOTT 1 x -200MVAr NEW CROSS 1 x +150MVAr LITTLEBROOK DAMHEAD TAUNTON FLEET 1 x 60MVAr 2 2 2 x -100MVAr 2 x -60MVAr CREEK 1 BRIDGWATER 1 x 225MVAr 2 4 x -100MVAr 3 x 60MVAr 1 1 2 BEDDINGTON 2 1 x 0/+60MVAr 2 x -60MVAr 3 KEMSLEY 2 1 1 2 2 x 45MVAr 1 AXMINSTER 1 x -60MVAr 2 2 MANNINGTON 2 1 2 NURSLING 1 INDIAN 1 2 x -100MVAr ROWDOWN CHESSINGTON 4 x -60MVAr QUEENS 2 EXETER 1 2 x -75/+150MVAr LOVEDEAN 1 1 x 225MVAr 2 x -75/+150MVAr 2 x 150MVAr SELLINDGE B LANDULPH CHICKERELL 6 x 60MVAr 1 x -74/+150MVAr CLEVE 3 x 60MVAr 1 x 50MVAr 2 x -60MVAr DUNGENESS HILL 1 x -200MVAr 1 x 0/+60MVAr BOTLEY BOLNEY 2 2 x 20MVAr 1 x -60MVAr MARCHWOOD 2 x -200MVAr 1 2 2 2 2 1 x -60MVAr 1 x 56MVAr ABHAM 1 x 225MVAr WOOD 2 x -30MVAr 2 x 45MVAr 1 x 225MVAr SELLINDGE A 1 1 x -200MVAr LANGAGE 2 4 x 60MVAr 1 1 1 NINFIELD 2 x -150/+150MVAr CANTERBURY FAWLEY 1 x 225MVAr 1 x -150/+150MVAr NORTH 2 x -60MVAr -200MVAr E de F 1 x -200MVAr (270kV DC)