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

SU D N I ED DINOR B N N U A O R MOYLE U VER I N U A D C S O T

I I A N C R V L C

H T H A W N B T H EGA D R AR E D AR N E AN I M WIG A F L N O TRA O TH LI R C A E N R R AD AM R Y E L KILMORACK MA D CULLIGRAN A O E K WSFYNYDD A YR S N VE ILW R L KI PENTIR H DEANIE E E K AIGAS W LMAR N AL I H 1 N T SHREWSBUR 2 BAGLAN SW ILL H VERDISCOTT O N U N BA I INDIAN QUEENS N GLEN N ANSEA

N IRONBRIDGE S ME 1 G T Y OC T E BISHOPS E R AD W 2 K T WOOD MARGAM S PEMBROKE FFESTINIOG LU A FA T OW WYLF NOR BIRKENHEAD KIRKBY R W O OWN PYLE C T SN N H LISTER Y E MOSSFORD DRIVE C HEAD LUICHAR D I GLEN GLEN STLEFI 2 OYL A 1 U SLO TH A D LANDULPH KYLE BRIDGE GRUDIE N ORRIN EV O FOR T 1 Y O OLMOOR D K 3 KI 1 2 LEE ON D 1 2 H N EN OE 2 E T L EV AD LD M T MA W ABER 1 D

AR OLMOOR

H O I Y AU 1 N 1 T 2 1 1 LANGAGE 1 YB U O C AR 2 2 ON D

N I N GU N

R N Y KI O THA OC T D

U VER H E G LE 2 2 LLIN

A 1 2 ST 2 H R I BUSHBUR LA L H K CAPENHURST PENN CARDIFF C D CASSLEY 2 1 T ILL W S L E BEA AUNT

U S AR H ALMA T UPPER EAST N ABHAM 2 1 L BOA LAIRG 2 O S OU AN E D 1

1 N N N 1 2 EIRGRID U

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

OCKER KI L HILL U O BRACO L A ST C WIND F F S A FIDDLERS LBR E M EH C ARR R KI GOV HINKLEY E FERR ANAH C K O R WILLENHALL 2 N

FO POINT N H RASSAU EAD E 2 1 OA RUGELEY S I E AG A SH P OLDBUR D X S CHICKERELL YER P AI A ARM D T E S BU E Y 1 N I A BUSTLEHOLM

GI SL N C P L E BRIDGW A S OU H ER ACT F L S 2 INVERNESS 1 E IRON 2 ALNESS 1 BRORA R BY AR FN 2 NAIRN C Y GAR BOA E K R TH HEYSHAM W O D Y IMPERIAL LAMB L OC LOTTE OC ON 2 EA A P ALLAS VA MOFF ES 2 W 1 T ARK TEN L MANNINGT OF H B 2 K ST H SEABANK N T 1 A TY U PORT

I TER 1 FOOT G H 2 2 1 TELEE 1 1

KEARSLEY W R MARCHWOOD DAINES K A EO ILL ELGIN STR PENWOR N GLEN ILBR 1 ALHAM T 2 STR HUTT R D DRAKELOW CELLARHEAD

2 D A G EET FECKENHAM I L U E FAR A D 2 1 M ON

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

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

T

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

T W D TE G PLA FR H ENDERBY 1 SOUTH STI A MONK 1 2 2 1 H EXTENSION DUNLA TFORD YST WIMBLEDON OUSE C BU 2 WILLESDEN TEMPLEBOROUGH 1 R E SH LIN JORDANTHORPE 2 ON BEDDINGT R G R G C G SMEA 1 2 W L U 2 H RYS 1 2 1 MILL 2 E 1 SPENNYMOOR BH MU ALDW BRINSWOR N C 3 2 1 FI 1 BR 1 1 1 2 1 R 1 R I T 2 D L I O HILL T 2 WEST R A AL NEW CROSS C L E D ON T P I ON C W H GI 1 PORT ARKE H ES 2 2

ETER 2 2 OSBALDWICK R D SUNDON 1 H A E ST E E ELSTREE I EV 1 I R S G M STFIE POPPLET B N MEL 2 .JOHNS ON SOAR RA LES 1 BL NINFIELD O 1 U

WOOD ON 1 1 BRIMSDOWN

TH O C GR H S C 1 TCLIFFE YTH AB B S O 2 EAD K T T S M ELLO C L 2 I 2 L ON ON Figure 2 E D W I R E O D D ER KE C CROSS 1 T 2 YE HOUSE R R AL E OTTENHAM MOBIL ST C 2 T R N ON CHESTERFIELD THORNT N THURCROFT 1 2 OR A 1 THAM 2 L GRENDON ETH . FERGUS ZI 2 1 E N 1 2 2 1 S E GRANGE PETERHEAD HURST EGGBOROUGH N ROAD CITY Y ES W 1 TYNEMOUTH 1 2 S LEVE ST 2 ON 2 1 1 2 4 . FERGUSGAS 1 AR 1 STRICHEN 1 3 2 2 GLEN BARDOLPH ST N WYMONDLEY MAIN 2 B 1 ROWDOWN 2 OKE THORPE MI R MARSH NOR 2 1 2 DUNGENESS E O HACKNEY L N DRAX 1 1 2 1 FRASERBURGH A T I ST 2 1 ON T T A1.3: GBExistingT H REDBRIDGE ON 2 HAM WEST 2 1 ON OFC ST SHIELDS MARNHAM SOUTH SOCON EA 2 1 A C R HIGH YTHORPE 1 2 U 2 T ED R LITTLEBROOK BARKING ON P 1 2 A AR 2 1

W H IGI PELHAM LACKENBY 1 OU BRAINTREE 1 2 ARLEY E BARKING SE BOLDON KEADBY WEST 1 2 WEST 2 1 BECK CREYKE

T THURROCK (270kV DC) OD POINT SELLINDGE BUR BRAMFORD MAIN 1 1 E deF 1 1 1 WELL 2 2 2 EAST NOR 2 2 TILBUR OFFER SINGLEWELL COTT 1 KILLINGHOLME 2 THFLEET 1 AM Y T ON NOR SAL 2 SAL WEST SP KINGSNOR TEND KEMSLEY TH NOR REFINER HUMBER ALDING THOLME 1 BUR CANTERBUR TH 1 2 1 2 RA NOR T 2 HAR Y TH ON YLEIGH MAIN 1 NOR TH 1 2 1 TLEPOOL W MAIN SAL HEDON ALPOLE MEDW GRAIN WICH Y BICKER FENN TEND 2 COR ransmission System BANK HUMBER SOUTH 1 A SIZEWELL YT Y BRITNED HA HAR CLEVE GRIMSBY ON HILL indicated onthisdiagram Note: Notallradial132kVcircuitsare WTHORN WEST PIT Legend TMOOR 132kV Substation 275kV Substation 400kV Substation 132kV Circuit 275kV Circuit 400kV Circuit NATIONAL GRID SP TRANSMISSION SHE TRANSMISSION S9 M7 FE M6 A N3 TAY M8 PORT N T3 R FOR

SU D N I ED S2 DINOR B N N U A O R MOYLE U VER I N U A D C S O T

I I A N H6 C R V L C

H T H A W L2 N B T H EGA D H1 L5 R AR E D AR N E AN I M WIG A F L N O TRA O TH LI R C A E N R R AD AM R F6 Y E L KILMORACK MA D CULLIGRAN A O E K WSFYNYDD N1 A YR S N VE ILW R L KI PENTIR H DEANIE E E K AIGAS W LMAR N AL I H 1 N T SHREWSBUR 2 BAGLAN SW ILL H VERDISCOTT O N U N BA I INDIAN QUEENS N GLEN N ANSEA

N IRONBRIDGE S ME 1 G T Y OC T E BISHOPS E R AD W 2 K T WOOD MARGAM S PEMBROKE FFESTINIOG LU A T1 FA T OW WYLF NOR BIRKENHEAD KIRKBY R W O OWN PYLE C T SN N H LISTER Y E MOSSFORD DRIVE C HEAD LUICHAR D I GLEN GLEN STLEFI 2 OYL A 1 U SLO TH A D LANDULPH KYLE BRIDGE GRUDIE N ORRIN EV O FOR T 1 Y O OLMOOR D K 3 KI 1 2 LEE ON S7 D 1 2 H N EN OE 2 E T L EV AD LD M T MA W ABER 1 D

AR OLMOOR

H O I Y AU 1 N 1 T 2 1 1 LANGAGE 1 YB U O C AR 2 2 ON D

N I N GU N

R N Y KI O THA OC T D

U VER H E G LE 2 2 LLIN

A 1 2 ST 2 H R I BUSHBUR LA L H K CAPENHURST PENN CARDIFF C D CASSLEY 2 1 T ILL W S L E BEA AUNT

U S AR H ALMA T UPPER EAST N ABHAM 2 1 L BOA LAIRG 2 O S OU AN E D 1 S6

1 N N N 1 2 EIRGRID U

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

OCKER KI L HILL U O BRACO L A ST C WIND F F S A FIDDLERS LBR E M EH C ARR R KI GOV HINKLEY E FERR ANAH C K O R WILLENHALL 2 N

FO POINT N H RASSAU EAD E 2 1 OA RUGELEY S R5 I E AG A SH P OLDBUR D X S CHICKERELL YER P AI A ARM D T E S BU E Y 1 N E1/E6 I A BUSTLEHOLM

GI SL N C P L E BRIDGW A N8 S OU E7 H ER ACT F L S4 S 2 INVERNESS 1 E IRON 2 ALNESS 1 BRORA R BY AR FN 2 NAIRN C Y GAR BOA E K R TH G7 HEYSHAM W O G5 D Y IMPERIAL LAMB L OC LOTTE OC ON 2 EA A P ALLAS VA MOFF ES 2 W 1 T ARK TEN L MANNINGT OF H B 2 K ST H SEABANK N T 1 A TY U PORT

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

KEARSLEY W R MARCHWOOD DAINES K A EO ILL ELGIN STR PENWOR N GLEN ILBR 1 ALHAM T G6 2 STR N4 HUTT R D DRAKELOW CELLARHEAD

2 D A G EET FECKENHAM I L G1 U E FAR A D 2 1 M ON

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

B2 T BERKSWELL N 1 1 2 N O ON EAST SOU W ER ELLAND HALL HAMS OR EWAR U K BRAMLEY I 1 1 BOTLEY 2 SH 2 D6 N7 C CULHAM JET FLEET IN N H COWLEY BLAC B3 WOOD LOVEDEAN B4 Y TH DIDCOT OA TH R O BRADFORD T A H KI EA U COVENTR OR W A TBR 1 2 S TH WEST N B W 2 1 E AMERSHAM Y K C E 2 1 L L I I AR LL AC C A I C MAIN D S1 Q8 K W U GE FOURST D K R BON I L NEEPSEND N Y R A L3 SHEFFIELD WEYBRIDGE E W I S3 T5 E LALEHAM N WEST CITY YB ONES 2 1 P1 S R IGH FERR 2 I 2 C D GALA 1 KAI 1 1 O GE KIRKST TH P5 U SKEL CHESSINGT 1 G YBRIDGE ME P ST I TA GRANGE NOR LL CLA EAST 2 SH R AR 2 WINCOBANK W 2 IVER S5 A OCKSBRIDGE S PITSMOOR R N E IE D BUZZARD LEIGHT ALL

T

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

T W D TE G PLA FR H ENDERBY 1 SOUTH STI A MONK D4 1 2 2 1 H EXTENSION DUNLA TFORD YST WIMBLEDON OUSE C BU 2 WILLESDEN TEMPLEBOROUGH 1 R E SH LIN JORDANTHORPE 2 ON BEDDINGT R A7 G R G C G A4 SMEA P2 1 2 W L U 2 H RYS 1 2 1 MILL 2 E P3 1 SPENNYMOOR BH B1 MU ALDW BRINSWOR N C 3 2 1 FI 1 BR 1 1 1 2 1 R 1 R I T 2 D L I O HILL T 2 WEST R A AL NEW CROSS C L E D ON L8 T P I ON C W H GI 1 PORT ARKE H ES 2 2

ETER 2 2 OSBALDWICK R D SUNDON 1 H A E ST E E ELSTREE I EV 1 I R S G M STFIE POPPLET B N MEL 2 .JOHNS ON SOAR RA LES 1 BL NINFIELD O 1 U

WOOD ON 1 1 BRIMSDOWN

TH O C GR H S C 1 TCLIFFE YTH AB B S O 2 EAD K T T S M ELLO C L 2 I 2 L ON ON Figure 2 E D W I Q5 R E O D Q6 D ER Q7 KE C CROSS 1 T 2 YE HOUSE R R AL E OTTENHAM MOBIL ST C 2 T R N ON CHESTERFIELD THORNT N THURCROFT 1 2 OR A 1 THAM 2 L GRENDON ETH . FERGUS ZI J6 2 1 E N 1 2 A8 L7 2 1 S E GRANGE PETERHEAD HURST EGGBOROUGH N P4 ROAD CITY Y ES W 1 TYNEMOUTH 1 2 S LEVE ST 2 ON 2 1 1 2 4 . FERGUSGAS 1 AR 1 STRICHEN 1 3 2 2 GLEN BARDOLPH ST A9 N WYMONDLEY MAIN 2 B 1 ROWDOWN 2 OKE THORPE T2 MI R MARSH NOR 2 1 2 DUNGENESS E O HACKNEY L N DRAX 1 1 2 1 FRASERBURGH A P6 J4 T I A3 ST 2 1 ON T T A1.4: GBT H REDBRIDGE ON 2 HAM WEST 2 1 ON OFC ST SHIELDS MARNHAM SOUTH SOCON EA D5 2 1 A C R HIGH YTHORPE 1 2 U 2 T ED C4 R LITTLEBROOK BARKING ON P 1 2 A AR 2 1

W H IGI PELHAM LACKENBY 1 OU BRAINTREE 1 2 ARLEY E A1 BARKING SE BOLDON K2 C6 KEADBY WEST 1 2 WEST 2 1 BECK CREYKE

T THURROCK (270kV DC) OD POINT SELLINDGE C9 BUR BRAMFORD MAIN 1 1 E deF 1 1 K5 J7 1 WELL J5 2 2 2 EAST NOR 2 2 TILBUR OFFER SINGLEWELL COTT J8 1 C1 KILLINGHOLME 2 THFLEET 1 C2 ransmission SystemETYSZones AM Y T ON NOR SAL 2 SAL WEST SP KINGSNOR TEND KEMSLEY TH NOR REFINER HUMBER ALDING THOLME 1 BUR CANTERBUR TH 1 Q4 2 1 2 RA NOR T 2 HAR Y TH ON YLEIGH MAIN 1 NOR TH 1 2 1 TLEPOOL W MAIN SAL HEDON ALPOLE MEDW GRAIN WICH Y BICKER FENN TEND 2 COR BANK HUMBER SOUTH 1 A SIZEWELL C7 YT Y BRITNED HA HAR CLEVE GRIMSBY ON HILL indicated onthisdiagram Note: Notallradial132kVcircuitsare WTHORN WEST PIT Legend Q2 TMOOR P8 K6 K1 K4 C3 C5 J1 P7 J3 J2 132kV Substation 275kV Substation 400kV Substation 132kV Circuit 275kV Circuit 400kV Circuit B0 B0 B1 DOUNREAY Figure A1.5: GB Transmission System Boundaries

MYBSTER GRUDIE DEANIE BRIDGE CASSLEY BRORA DUNBEATH

CULLIGRAN MOSSFORD THURSO LAIRG SHIN

AIGAS LUICHART ALNESS

KILMORACK ORRIN STRICHEN ST. FERGUS NAIRN ELGIN MOBIL ARDMORE KEITH PETERHEAD BEAULY FRASERBURGH DUNVEGAN INVERNESS ST. FERGUS GAS EDINBANE FASNAKYLE PERSLEY PETERHEAD FARR GRANGE WIND FARM BOAT OF GARTEN GLENFARCLAS Legend KNOCKNAGAEL B1 BROADFORD GLENDOE CRAIGIEBUCKLER 400kV Circuit BLACKHILLOCK KINTORE TARLAND 275kV Circuit DALLAS FIDDES FOYERS SHE TRANSMISSION 132kV Circuit FORT WILLIAM TUMMEL B2 BRECHIN GRID FORT AUGUSTUS B2 ARBROATH 400kV Substation KILLIN B3b TEALING MILTON OF CRAIGIE 275kV Substation TAYNUILT DALMALLY 132kV Substation FERNOCH CRUACHAN ERROCHTY CHARLESTON System Boundaries INVERARAY INVERARNAN COUPAR ANGUS AN SUIDHE BURGHMUIR B4 Note: Not all radial 132kV circuits are PORT ANN SLOY BRACO LEVEN CUPAR ABERNETHY indicated on this diagram GLENROTHES CARRADALE B3b

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

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

CLYDE NORTH ELVANFOOT AUCHENCROSH HADYARD HILL CLYDE SOUTH COYLTON MOYLE MOFFAT Harestanes MARK HILL GALASHIELS ECCLES

MAYBOLE CHAPELCROSS

GLENLUCE HAWICK

KENDOON DUMFRIES B6 GRETNA FOURSTONES BLYTH TYNEMOUTH SOUTH WEST OFFERTON BOLDON NEWTON STEWART GLENLEE TONGLAND 1 1 SHIELDS 1 2 1 2 2 2 B6 HARKER HAWTHORN PIT B7 STELLA WEST

B11 2 1 HARTMOOR SPENNYMOOR LACKENBY SALTHOLME B16 HUTTON 2 1 HEYSHAM 2 2 2 1 HARTLEPOOL B7a WASHWAY 1 1 TOD POINT FARM 2 1 STANAH 2 1 B7

PENWORTHAM HEDON B7a 1 1 BRADFORD KIRKSTALL NORTON WEST SALTEND 2 2 NORTH THORNTON CREYKE SALTEND 1 BECK HUMBER 1 2 EC1 2 SKELTON REFINERY PADIHAM 2 SOUTH KIRKBY 3 1 2 RAINHILL GRANGE OSBALDWICK 1 HUMBER NW4 2 1 POPPLETON KEADBY KILLINGHOLME BANK 2 1 2 1 1 2 NW3 LISTER ELLAND 1 DRAX 3 4 FERRYBRIDGE GRIMSBY NW2 DRIVE FIDDLERS 2 1 1 WEST NW1 FERRY 2 2 1 1 ROCHDALE 2 2 CAPENHURST KEARSLEY MONK WEST BURTON 2 2 2 1 FRYSTON 1 2 EGGBOROUGH BIRKENHEAD 2 1 1 2 1 1 2 1 WHITEGATE THORPE 1 MARSH 1 2 1 2 STALYBRIDGE 1 2 COTTAM 2 WYLFA NEEPSEND STOCKSBRIDGE WEST MELTON 1 1 2 FRODSHAM SOUTH PITSMOOR 1 2 2 MANCHESTER NW1 2 2 1 2 BREDBURY ALDWARKE 1 1 EIRGRID DEESIDE 1 WINCOBANK 2 PENTIR DAINES THURCROFT 2 1 2 TEMPLEBOROUGH HIGH 1 1 MARNHAM 2 1 DINORWIG MACCLESFIELD BRINSWORTH 2 FFESTINIOG 1 B11 NW2 1 2 SHEFFIELD 2 CITY WILLINGTON EAST 1 2 B8 CHESTERFIELD B16 TRAWSFYNYDD 1 CELLARHEAD BICKER B9 NORTON LEES NW3 JORDANTHORPE 2 FENN EC5 1 2 STAYTHORPE 1 RUGELEY 1 2 DRAKELOW STOKE SPALDING GRID NW4 2 RATCLIFFE SHREWSBURY 1 BARDOLPH NORTH LEGACY 1 ON SOAR B8 IRONBRIDGE 2 2 2 BUSHBURY WILLENHALL 2 1 EC3 1 PENN B17 1 2 WALPOLE OCKER COVENTRY HILL TIONAL 2 1 2 1 2 1 HAMS EATON HALL ENDERBY SOCON KITWELL NECHELLS NA 1 1 1 2 OLDBURY 2 BISHOPS 1 NORWICH WOOD 2 2 2 BURWELL 1 PATFORD GRENDON MAIN BUSTLEHOLM BRIDGE MAIN 2 FECKENHAM BERKSWELL EAST 1 WYMONDLEY BRAMFORD CLAYDON SUNDON MAIN PELHAM B17 1 2 SIZEWELL B9 2 1 1 2 EC6 PEMBROKE WALHAM AMERSHAM RYE HOUSE B12 MAIN LEIGHTON BRAINTREE BUZZARD ELSTREE 2 COWLEY WARLEY EC5 SW1 1 1 1 RAYLEIGH MAIN RASSAU 1 B15 1 1 2 SW2 1 2 2 2 2 2 2 CORYTON CILFYNYDD IVER SWANSEA NORTH CULHAM JET WATFORD WALTHAM SOUTH CROSS 1 2 1 1 2 MILL HILL TILBURY BRIMSDOWN 1 2 4 3 BAGLAN 2 BAY 1 2 UPPER SW2 BOAT IMPERIAL MARGAM PARK WILLESDEN REDBRIDGE BARKING 1 2 1 DIDCOT EALING MEDWAY 1 2 2 2 2 2 2 2 MINETY 1 2 USKMOUTH IRON 1 W 1 1 E1 1 1 1 2 PYLE ACTON TOTTENHAM GRAIN 1 2 1 2 LALEHAM 2 1 1 1 CARDIFF 2 2 EAST HACKNEY 1 2 2 1 WEST THURROCK 2 1 WEST 2 1 CITY NORTHFLEET BRITNED HAM EAST 1 ROAD 1 BRAMLEY SW1 WHITSON MELKSHAM 1 1 1 1 2 2 2 ST.JOHNS TREMORFA 1 2 BARKING WIMBLEDON WOOD KINGSNORTH 1 2 2 1 HURST HINKLEY SEABANK 1 1 B10 1 2 WEST SINGLEWELL ABERTHAW POINT 2 1 1 WEYBRIDGE 2 2 B13 NEW CROSS LITTLEBROOK ALVERDISCOTT TAUNTON FLEET 1 2 BRIDGWATER SC1 1 2 1 2 BEDDINGTON 2 3 ROWDOWN B14/B14e KEMSLEY 2 1 2 1 2 AXMINSTER 2 MANNINGTON LOVEDEAN 1 1 2 NURSLING 1 INDIAN CHESSINGTON QUEENS 2 EXETER 1 1 CLEVE LANDULPH CHICKERELL BOTLEY DUNGENESS SELLINDGE HILL WOOD 1 BOLNEY 2 NINFIELD 2 2 2 2 ABHAM MARCHWOOD SC1

LANGAGE FAWLEY 2 1 1 1 1 2 1 CANTERBURY NORTH B12 B15 E de F (270kV DC) B13 B10 DOUNREAY 2 x -60MVAr Figure A1.6: GB Reactive Compensation Plant

MYBSTER GRUDIE DEANIE BRIDGE CASSLEY BRORA DUNBEATH

CULLIGRAN MOSSFORD THURSO LAIRG SHIN

AIGAS LUICHART ALNESS

KILMORACK ORRIN STRICHEN ST. FERGUS NAIRN ELGIN MOBIL ARDMORE KEITH PETERHEAD BEAULY FRASERBURGH DUNVEGAN INVERNESS ST. FERGUS GAS EDINBANE FASNAKYLE PERSLEY PETERHEAD FARR GRANGE WIND FARM BOAT OF GARTEN GLENFARCLAS Legend KNOCKNAGAEL BROADFORD GLENDOE CRAIGIEBUCKLER 400kV Circuit BLACKHILLOCK KINTORE 2 x -60MVAr TARLAND 275kV Circuit DALLAS FIDDES FOYERS SHE TRANSMISSION 132kV Circuit FORT WILLIAM TUMMEL 3 x -60MVAr BRECHIN GRID FORT AUGUSTUS 1 x -75/225MVAr ARBROATH 400kV Substation KILLIN 2 x 45MVAr 2 x -30MVAr TEALING MILTON OF CRAIGIE 275kV Substation TAYNUILT DALMALLY 132kV Substation FERNOCH SVC CRUACHAN ERROCHTY CHARLESTON MSC INVERARAY INVERARNAN COUPAR ANGUS Reactor AN SUIDHE Series Capacitor BURGHMUIR Note: Not all radial 132kV circuits are PORT ANN SLOY BRACO LEVEN CUPAR ABERNETHY indicated on this diagram GLENROTHES DUNOON CARRADALE HELENSBURGH

STRATHLEVEN WESTFIELD WESTFIELD RED HOUSE WHISTLEFIELD 1 x 150MVAr WINDYHILL LONGANNET MOSSMORRAN GLENNISTON DRUMCHAPEL KINCARDINE WINDYHILL DEVONSIDE 1 x -60MVAr STIRLING LAMBHILL BONNYBRIDGE

ERSKINE DENNY PORT DUNDAS

DEVOLMOOR WEST GEORGE STREET 2 x -60MVAr 2 x -60MVAr BRAEHEAD PARK GRANGEMOUTH 2 x -60MVAr SHRUBHILL CHARLOTTE STREET DEWAR PLACE DALMARNOCK EASTERHOUSE SIGHTHILL 1 x -60MVAr DEVOLMOOR PORTOBELLO GOVAN COATBRIDGE HAGGS ROAD CURRIE WHITEHOUSE HUNTERSTON CLYDE'S MILL HUNTERSTON EAST KILBRIDE PAISLEY NEWARTHILL GIFFNOCK KILWINNING WHITELEE BLACKLAW MEADOWHEAD 1 x -60MVAr KAIMES COCKENZIE BLACKLAW SMEATON NEILSTON TRANSMISSION 1 x -50MVAr BUSBY WHITELEE EXT CRYSTAL RIG KILMARNOCK TOWN EAST KILBRIDE SOUTH STRATHAVEN TORNESS SP WISHAW 2 x -150MVAr KILMARNOCK SOUTH 1 x -60MVAr DUNLAW EXTENSION AYR COALBURN Linmill

CLYDE NORTH ELVANFOOT AUCHENCROSH HADYARD HILL 1 x 225MVAr CLYDE SOUTH COYLTON MOYLE MOFFAT Harestanes MARK HILL GALASHIELS ECCLES

MAYBOLE CHAPELCROSS

GLENLUCE HAWICK

KENDOON DUMFRIES GRETNA 1 x -60MVAr FOURSTONES BLYTH TYNEMOUTH SOUTH WEST OFFERTON BOLDON NEWTON STEWART GLENLEE TONGLAND 1 1 SHIELDS 1 2 1 2 2 2 1 x 60MVAr HARKER HAWTHORN 2 x 225MVAr 2 x -75/+150MVAr PIT 2 x 225MVAr STELLA WEST

2 1 HARTMOOR SPENNYMOOR 3 xLACKENBY 20MVAr SALTHOLME HUTTON 2 1 1 x 225MVAr 1 x -60MVAr HEYSHAM 2 x 35% 2 2 2 1 HARTLEPOOL WASHWAY 1 1 TOD POINT FARM 2 1 STANAH 2 1 1 x 60MVAr 2 x -60MVAr 1 x 150MVAr PENWORTHAM HEDON 1 1 BRADFORD KIRKST2 x -60MVALL Ar NORTON WEST 3 x 20MVAr SALTEND 2 2 1 x -60MVAr NORTH THORNTON CREYKE SALTEND 1 BECK HUMBER 1 2 2 SKELTON REFINERY PADIHAM 3 x 60MVAr 2 SOUTH KIRKBY 3 1 2 RAINHILL GRANGE OSBALDWICK 4 x 45MVAr 1 4 x 45MVAr 1 x 150MVAr HUMBER 2 1 1 x -100MVAr POPPLETON KEADBY KILLINGHOLME BANK 2 1 2 1 1 2 LISTER ELLAND 1 2 x -60MVDRAXAr 3 4 1 x -60MVAr FERRYBRIDGE GRIMSBY DRIVE FIDDLERS 2 1 1 x -100MVAr 1 WEST FERRY 2 2 1 3 x 60MVAr 1 ROCHDALE 2 1 x -200MVAr 1 x 150MVAr 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 x -60MVAr 1 1 2 1 WHITEGATE 1 x 150MVAr THORPE 1 x -200MVAr 1 2 1 x -60MVAr 1 MARSH 1 x 60MVAr 1 2 STALYBRIDGE 1 2 COTTAM 2 x -200MVAr 2 WYLFA NEEPSEND STOCKSBRIDGE 3 x 45MVAr WEST MELTON 1 1 2 FRODSHAM SOUTH PITSMOOR 1 2 2 MANCHESTER 2 x -60 to -30MVAr 2 2 1 2 x -60MVAr 2 BREDBURY ALDWARKE 1 1 1 x -200MVAr EIRGRID DEESIDE 1 WINCOBANK 2 1 x -100MVArPENTIR DAINES THURCROFT 2 1 2 TEMPLEBOROUGH HIGH 1 1 MARNHAM 2 1 DINORWIG MACCLESFIELD BRINSWORTH 2 FFESTINIOG 1 1 2 1 x -75/+150MVAr SHEFFIELD 2 1 x 225MVAr 2 x -75/150MVAr CITY 2 x 225MVAr WILLINGTON EAST 1 2 4 x 60MVAr CHESTERFIELD TRAWSFYNYDD 1 2 x -60MVAr CELLARHEAD BICKER NORTON LEES JORDANTHORPE 2 1 x -60MVAr FENN 1 x -60 to -30MVAr 1 x 225MVAr 1 2 1 x -75/+150MVAr STAYTHORPE 1 RUGELEY 2 x 225MVAr 1 2 DRAKELOW STOKE SPALDING GRID 2 RATCLIFFE SHREWSBURY 1 BARDOLPH NORTH LEGACY 1 ON SOAR IRONBRIDGE 2 3 x 60MVAr 2 2 1 x -60MVAr 1 x 225MVAr BUSHBURY WILLENHALL 2 1 1 PENN 1 x 0/+60MVAr 1 2 WALPOLE OCKER COVENTRY 3 x 60MVAr HILL 1 x 0/+60MVAr 2 x -60MVAr TIONAL 1 x 150MVAr 3 x 60MVAr 2 1 2 1 2 1 HAMS 1 x -60MVAr 2 x 225MVAr 3 x 60MVAr EATON HALL ENDERBY 2 x 225MVAr SOCON KITWELL NECHELLS 1 x 0/+60MVAr 1 x -60MVAr

NA 1 1 1 3 x 60MVAr 2 OLDBURY 2 3 x 60MVAr BISHOPS 1 x 0/+60MVAr 1 x 150MVAr 1 NORWICH WOOD 2 2 2 x -60MVAr 2 BURWELL 1 1 x -60MVAr PATFORD GRENDON MAIN 3 x 60MVAr BUSTLEHOLM BRIDGE MAIN 1 x 20MVAr FECKENHAM 1 x 225MVAr 2 2 x -60MVAr BERKSWELL 1 x -50/+225MVAr 2 x 225MVAr 2 x -75/+150MVAr 2 x 60MVAr EAST 1 2 x -60MVAr WYMONDLEY 2 x -60MVAr BRAMFORD 1 x -75/+150MVAr SUNDON 2 x -60MVAr CLAYDON MAIN PELHAM 3 x 60MVAr 1 x -60MVAr 1 2 SIZEWELL 1 x 225MVAr 2 x -60MVAr 2 1 1 2 PEMBROKE WALHAM AMERSHAM RYE HOUSE MAIN LEIGHTON 2 x 0/+60MVAr BRAINTREE BUZZARD 1 x -200MVAr 1 x -60MVAr ELSTREE WARLEY 2 3 x 60MVAr COWLEY 1 2 x -60MVAr 1 RAYLEIGH MAIN 3 x 60MVAr 1 RASSAU 2 x -60MVAr 2 1 1 2 x -200MVAr 1 1 2 2 2 2 3 x 60MVAr 2 2 CORYTON 2 x -60MVAr CILFYNYDD IVER SWANSEA NORTH CULHAM JET WATFORD WALTHAM 1 x -200MVAr SOUTH CROSS 1 2 1 1 2 MILL HILL TILBURY 2 x -60MVAr BRIMSDOWN 1 2 4 3 BAGLAN 2 BAY 1 2 UPPER BOAT IMPERIAL MARGAM PARK WILLESDEN REDBRIDGE BARKING 1 2 DIDCOT EALING 3 x -100MVAr MEDWAY 1 2 x -60MVAr 2 1 x 45MVAr 1 2 2 2 2 2 2 1 x 45MVAr 2 x 0/+60MVAr MINETY 1 2 USKMOUTH IRON 1 W 1 1 E1 1 1 1 2 PYLE ACTON TOTTENHAM GRAIN 1 2 LALEHAM 2 1 2 x 0/+60MVAr 1 2 1 2 x -100MVAr 1 CARDIFF 2 2 1 2 EAST 2 x +60MVAr HACKNEY 2 1 3 x 60MVAr WEST THURROCK 2 1 1 x -200MVAr WEST 2 1 2 x -60MVAr 2 x -100/150MVAr CITY NORTHFLEET BRITNED 3 x 60MVAr HAM EAST 1 x -200MVAr 1 ROAD 1 BRAMLEY WHITSON MELKSHAM 1 x -200MVAr 1 1 1 1 2 2 2 ST.JOHNS TREMORFA 1 2 BARKING WIMBLEDON WOOD 1 x 225MVAr 2 x -60MVAr 2 1 KINGSNORTH 1 2 2 x -100M1 VAr 1 HURST HINKLEY SEABANK SINGLEWELL ABERTHAW 1 2 2 1 WEST POINT 1 x -200MVAr 2 x 60MVAr 1 1 x 225MVAr WEYBRIDGE 2 2 NEW CROSS 1 x +150MVAr LITTLEBROOK ALVERDISCOTT TAUNTON 3 x 60MVAr FLEET 2 x -100MVAr 2 x -60MVAr 1 x 60MVAr 1 2 BRIDGWATER 2 x -60MVAr 3 x -100MVAr 1 x -74/+150MVAr 1 2 1 2 BEDDINGTON 2 x -60MVAr 2 1 x 0/+60MVAr 3 ROWDOWN KEMSLEY 2 1 1 x -200MVAr 1 2 2 x 45MVAr 1 x 225MVAr 2 AXMINSTER 2 MANNINGTON LOVEDEAN 1 2 x -100MVAr 1 2 NURSLING 1 2 x -60MVAr INDIAN CHESSINGTON 1 3 x -30MVAr 2 x -150/+150MVAr QUEENS 2 EXETER 2 x -75/+150MVAr 2 x 150MVAr 1 2 x -75/+150MVAr 1 x -200MVAr CLEVE LANDULPH CHICKERELL 6 x 60MVAr BOTLEY 1 x 50MVAr BOLNEY NINFIELD DUNGENESS SELLINDGE 2 HILL 3 x 20MVAr 1 x -60MVAr WOOD 1 2 2 2 2 ABHAM 1 x 225MVAr MARCHWOOD 2 x 45MVAr 2 1 1 1 1 LANGAGE FAWLEY 4 x 60MVAr 1 x -150/+150MVAr 1 2 CANTERBURY 1 x 0/+60MVAr 1 x 225MVAr -200MVAr NORTH 1 x 72.5MVAr 2 x -60MVAr E de F 2 x -30MVAr (270kV DC)