Appendix Contents

Electricity Ten Year Statement 2016 Electricity Ten Year Statement 2016 1 Appendix Contents

To demonstrate the impact of future changes on the transmission network a set of winter peak power flow C diagrams are presented in Appendix C. These show snapshots of present and future power flows along major circuit routes for the Gone Green Scenario. The expected changes in the network are based on the previous year’s development decisions. Power flow diagrams

Appendix C

C1 – GB Power Flow Diagram Gone Green 2016/17...... 2 C2 – GB Power Flow Diagram Gone Green 2018/19...... 3 C3 – GB Power Flow Diagram Gone Green 2020/21...... 4 C4 – GB Power Flow Diagram Gone Green 2022/23...... 5 C5 – GB Power Flow Diagram Gone Green 2025/26...... 6 A ppendi x C x C ppendi A 2 Figure C1: GB Power Flow Diagram Gone Green 2016/17

Lairg Flow Direction

Brora Harris Shin Major Generating Sites Including Pumped Storage

100 Connected at 400kV Grudie Bridge Mossford Alness Connected at 275 kV Corriemoillie Fraserburgh Hydro Generation Luichart Orrin Elgin Macduff St. Fergus Ardmore Deanie 100 Keith Culligran Dingwall Strichen Nairn Blackhillock Offshore Wind Projects (as of 2016 - OCT - TEC) Aigas Kilmorack Inverness Dunvegan Peterhead Beauly 420 470 Knocknagael 510 Fasnakyle Dyce Round 1 Kintore Persley Glen Broadford 75 Morrison Woodhill Willowdale Round 2 Caennacroc Foyers Clayhills Fort Augustus Boat of Quoich Garten Tarland Glendoe Craigiebuckler Redmoss Scottish Territorial Waters Sites Invergarry 840

Kinlochleven Round 3 Tummel Fiddes

Fort William Errochty Power Station 590 Errochty 660 Rannoch 30 Clunie Tummel Bridge Tealing Dudhope Arbroath Lochay Cashlie Lyndhurst Milton of Craigie Taynuilt Killin Charleston Dalmally Finlarig Cruachan Glenagnes Dudhope 1050 Burghmuir 490 St. Fillans Nant Clachan Inverarnan SCOTTISH HYDRO-ELECTRIC 600 Cupar Inveraray Sloy TRANSMISSION Glenrothes 300 Leven 180 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 Erskine Lambhill687 Whitehouse Devol Easterhouse Fallago Smeaton Moor Coatbridge Livingston Newarthill Currie Kaimes Crossaig 1441 Hunterston Neilston Clydes Mill 195Black Law Extension NorthHunterston Strathaven Dunlaw Extension Berwick 118 East Black Law Marshall Meadows Busby East 307 Kilwinning Whitelee Wishaw Hunterston Kilmarnock Kilbride Saltcoats Town Whitelee ExtnSouth CoalburnLinnmill Eccles Meadowhead SP TRANSMISSION LTD Carradale Kilmarnock Galashiels39 South Coalburn Galashiels Ayr 115 1435 Clyde (North) Coylton Clyde (South) 1820 Elvanfoot Hawick Harestanes Maybole Moffat Auchenwynd New Cumnock Moffat Hadyard Harestanes

Kendoon 53 Carsfad Markhill To Northern Ireland 251 Glenlee Gretna Blyth Arecleoch Kilgallioch Earlstoun Dumfries Ecclefechan Auchencrosh Fourstones Newton Stewart Tynemouth Chapelcross1858 Harker South Shields 73 399 Stella West Tongland West Boldon Glenluce Offerton Hawthorne Pit Hartmoor Spennymoor Hartlepool Saltholme Tod Point Teesside Norton Robin Rigg Greystones Grangetown 1472 Lackenby

689 Hutton 873 Ormonde

Walney I & II Quernmore Heysham Osbaldwick Knaresborough West of Duddon Sands Middleton Barrow Bradford Thornton West Kirkstall Skelton Poppleton Creyke Beck Westermost Rough Stanah Padiham Grange Monk 188 Fryston1163 Saltend North Hedon Penwortham Drax Humber Gateway 330 Elland Saltend South Eggborough Rochdale Ferrybridge To Ireland 750 To Ireland Washway Keadby Humber Refinery Thorpe Burbo Bank Farm Kearsley Whitegate Templeborough Killingholme Kirkby 1035 West Marsh South Stalybridge Melton Humber Grimsby West Gwynt y Mor Carrington Pitsmoor West Wylfa Rainhill Stocksbridge Aldwarke Bank Birkenhead Winco Bank Burton Bredbury Neepsend Thurcroft Rhyl Flats Fiddlers North Hoyle RocksavageRocksavage Daines Sheffield City Ferry Cottam Brinsworth Inner Dowsing Capenhurst Frodsham Jordanthorpe Bodelwyddan Norton Lees Pentir Macclesfield Chesterfield Lincs Deeside High Dinorwig 821 South Manchester Connah’s Quay Marnham Sheringham Shoal 1634 Staythorpe Lynn Legacy Ffestiniog Cellarhead Stoke Bardolph 1644 Bicker Fen 632 Ratcliffe 2123 Willington on Soar Trawsfynydd 1454 2023 Drakelow Walpole Rugeley Spalding2198 North Necton Ironbridge Sutton Norwich Main Bushbury Bridge Willenhall Bustleholm Shrewsbury Penn Enderby Nechells Hams Hall Ocker Hill 1954 Coventry 1747 Oldbury 1774 Kitwell Berkswell 652

Burwell Main Sizewell Feckenham Grendon Bishops Wood Eaton 1003 Socon 1864 Patford Bramford Bridge 1680 87 Greater Gabbard 544 Sundon East Claydon Pelham Braintree Wymondley Leighton Buzzard Rassau 555 Walham Waltham 1061 Rye House Cross Imperial Brimsdown Park Gunfleet Sands I&II Cowley 1056 Swansea North 97 Watford Elstree Hackney To Netherlands Pembroke Amersham Main London Array Cilfynydd Culham Tottenham Redbridge Rayleigh Main Baglan Bay Mill Hill Warley Upper Boat Uskmouth Minety Didcot Margam Iron Acton Willesden Barking Coryton Alpha Steel Whitson Iver Ealing Pyle West Ham City Rd West Thurrock Tilbury Grain Hurst Seabank St Johns Kentish Flats 1656 Wood New Northfleet Thanet Tremorfa Laleham Kingsnorth 1090 East Singlewell Kemsley Cleve Hill Atlantic Array Aberthaw Cardiff Melksham Chessington Cross East West Weybridge Rowdown Bramley Littlebrook 1252 Beddington Canterbury 616 Fleet Wimbledon 190 North 812 Hinkley Point Sellindge Bridgwater Alverdiscott 195 26 Bolney 680 Taunton Nursling 654 1596 Dungeness 531 Mannington Marchwood Lovedean Ninfield Axminster 1238 68 Fawley Botley Wood Exeter 216 To France

147 Chickerell

Langage Abham

Indian Queens Landulph 3 Figure C2: GB Power Flow Diagram Gone Green 2018/19

Lairg Flow Direction

Brora Harris Loch Buidhe Shin Major Generating Sites Including Pumped Storage

490 Connected at 400kV Grudie Bridge Mossford Alness Connected at 275 kV Corriemoillie Fraserburgh Hydro Generation Luichart Orrin Elgin Macduff St. Fergus Ardmore Deanie 80 Keith Culligran Dingwall Strichen Offshore Wind Projects (as of 2016 - OCT - TEC) Nairn Blackhillock 200 Aigas Kilmorack Inverness Dunvegan Peterhead Beauly 580 700 Knocknagael 180 Fasnakyle Dyce Round 1 Kintore Persley Glen Broadford 60 Morrison Woodhill Willowdale Round 2 Caennacroc Foyers Clayhills Fort Augustus Boat of Quoich Garten Tarland Glendoe Craigiebuckler Redmoss Scottish Territorial Waters Sites Invergarry 960

Kinlochleven Round 3 Tummel Fiddes

Fort William Errochty Power Station 470 Errochty 530 Rannoch 25 Clunie Tummel Bridge Tealing Dudhope Arbroath Lochay Cashlie Lyndhurst Milton of Craigie Taynuilt Killin Charleston Dalmally Finlarig Cruachan Glenagnes Dudhope 1160 Burghmuir 420 St. Fillans Nant Clachan Inverarnan SCOTTISH HYDRO-ELECTRIC460 Cupar Inveraray Sloy TRANSMISSION Glenrothes 300 Leven 180 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 Erskine Lambhill Whitehouse Devol Easterhouse Fallago Smeaton Branxton Moor Coatbridge Livingston Newarthill Currie Kaimes Crossaig 1091 Hunterston Neilston Clydes Mill 222Black Law Extension NorthHunterston Strathaven Dunlaw Extension Berwick 162 East Black Law Marshall Meadows Busby East 90 Kilwinning Whitelee Wishaw Hunterston Kilmarnock Kilbride Saltcoats Town Whitelee ExtnSouth CoalburnLinnmill Eccles Meadowhead SP TRANSMISSION LTD Carradale Kilmarnock Galashiels25 South Coalburn Galashiels Ayr 514 Clyde (North) Coylton Clyde (South) 1327 Elvanfoot Hawick Harestanes Maybole Moffat Auchenwynd New Cumnock Moffat Hadyard Harestanes

Kendoon 397 Carsfad 80 Markhill To Northern Ireland Glenlee Gretna Blyth Arecleoch Kilgallioch Earlstoun Dumfries Ecclefechan Auchencrosh Fourstones Newton Stewart Tynemouth Chapelcross925 Harker South Shields 69 205 Stella West Tongland West Boldon Glenluce Offerton Hawthorne Pit Hartmoor Spennymoor Hartlepool Saltholme Tod Point Teesside Norton Robin Rigg Greystones Grangetown 710 2260 Lackenby

622 Hutton 758 Ormonde

Walney I & II Quernmore Heysham Osbaldwick Knaresborough West of Duddon Sands Middleton Barrow Bradford Thornton West Kirkstall Skelton Poppleton Creyke Beck Westermost Rough Stanah Padiham Grange Monk 151 Fryston1043 Saltend North Hedon Penwortham Drax Humber Gateway 441 Elland Saltend South Eggborough Rochdale Ferrybridge To Ireland 917 To Ireland Washway Keadby Humber Refinery Thorpe Burbo Bank Farm Kearsley Whitegate Templeborough Killingholme Kirkby 734 West Marsh South Stalybridge Melton Humber Grimsby West Gwynt y Mor Carrington Pitsmoor West Wylfa Rainhill Stocksbridge Aldwarke Bank Birkenhead Winco Bank Burton Bredbury Neepsend Thurcroft Rhyl Flats Fiddlers North Hoyle RocksavageRocksavage Daines Sheffield City Ferry Cottam Brinsworth Inner Dowsing Race Bank Dudgeon Capenhurst Frodsham Jordanthorpe Bodelwyddan Flintshire Norton Lees Pentir Bridge Macclesfield Chesterfield Lincs High Dinorwig 1988 South Manchester Connah’s Quay Marnham Sheringham Shoal 2162 Staythorpe Lynn Legacy Ffestiniog Cellarhead Stoke Bardolph 1122 Bicker Fen 851 Ratcliffe 2096 Willington on Soar Trawsfynydd 940 2529 Drakelow Walpole Rugeley Spalding1680 Ryhall North Necton Ironbridge Sutton Norwich Main Bushbury Bridge Willenhall Bustleholm Shrewsbury Penn Enderby Nechells Hams Hall Ocker Hill 2046 Coventry 1639 Oldbury 1593 Kitwell Berkswell 541

Burwell Main Sizewell Feckenham Grendon Bishops Wood Eaton 979 Socon 1967 Patford Bramford Bridge 1366 209 Greater Gabbard 500MW 708 Sundon East Claydon Pelham Braintree Wymondley Leighton Buzzard Greater Gabbard 2nd part Rassau 471 Walham Waltham 964 Rye House Cross Imperial Brimsdown Park Gunfleet Sands I&II Cowley 1078 Swansea North 104 Watford Elstree Hackney To Netherlands Pembroke Amersham Main London Array Cilfynydd Culham Tottenham Redbridge Rayleigh Main Baglan Bay Mill Hill Warley Upper Boat Uskmouth Minety Didcot Margam Iron Acton Willesden Barking Coryton Alpha Steel Whitson Iver Ealing Pyle West Ham City Rd West Thurrock Tilbury Grain Hurst Seabank St Johns Kentish Flats 1543 Wood New Northfleet Thanet Tremorfa Laleham Kingsnorth 945 East Singlewell Kemsley Cleve Hill Aberthaw Cardiff Melksham Chessington Cross East Bramley West Weybridge Rowdown Littlebrook 1197 Beddington Canterbury 532 Fleet Wimbledon 120 North 750 Hinkley Point Sellindge West Sellindge Bridgwater Alverdiscott 180 96 Bolney 496 Taunton Nursling 770 1412 Dungeness 488 Mannington Marchwood Lovedean Ninfield Axminster 1062 61 Fawley Botley Wood Exeter 182 To France

147 Chickerell Rampion

Langage Abham

Indian Queens Landulph 4 Figure C3: GB Power Flow Diagram Gone Green 2020/21

400kV Substations 275 kV Substations 132kV Substations Offshore AC Platform Offshore DC Platform 400kV Circuits 275kV Circuits 220kV Circuits 132kV Circuits Offshore AC Cable Offshore DC Cable Interconnectors Dounreay Thurso Reconductor Circuit Spittal 300 85 Mybster New Circuit Cassley Beatrice Stornoway Dunbeath 1234 Power Flow MW

Lairg Flow Direction

Brora Harris Loch Buidhe Shin Major Generating Sites Including Pumped Storage

200 Connected at 400kV Grudie Bridge Mossford Alness Connected at 275 kV Corriemoillie Fraserburgh Hydro Generation Luichart Orrin Elgin Macduff St. Fergus Ardmore Deanie 50 Keith Culligran Dingwall Strichen Nairn Blackhillock 430 Offshore Wind Projects (as of 2016 - OCT - TEC) Aigas Kilmorack Inverness Dunvegan Peterhead Beauly 320 870 Knocknagael 250 Fasnakyle Dyce Round 1 Kintore Persley Glen Broadford 60 Morrison Woodhill Willowdale Round 2 Caennacroc Foyers Clayhills Fort Augustus Boat of Quoich Garten Tarland Glendoe Craigiebuckler Redmoss Scottish Territorial Waters Sites Invergarry 1000

Kinlochleven Round 3 Tummel Fiddes

Fort William Errochty Power Station 640 Errochty 743 Rannoch 40 Clunie Tummel Bridge Tealing Dudhope Arbroath Lochay Cashlie Lyndhurst Milton of Craigie Taynuilt Killin Charleston Dalmally Finlarig Cruachan Glenagnes Dudhope 1374 Burghmuir 600 St. Fillans Nant Inverarnan Clachan Neart na Gaolthe SCOTTISH HYDRO-ELECTRIC640 Cupar Inveraray Sloy TRANSMISSION Glenrothes 297 Leven 170 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 To Norway Erskine Lambhill Whitehouse Devol Easterhouse Fallago Smeaton Moor Coatbridge Livingston Newarthill Currie Kaimes Crossaig 1267 Hunterston Neilston Clydes Mill 410Black Law Extension NorthHunterston Strathaven Dunlaw Extension Berwick 174 East Black Law Marshall Meadows Busby East 178 Kilwinning Whitelee Wishaw Hunterston Kilmarnock Kilbride Saltcoats Town Whitelee ExtnSouth CoalburnLinnmill Eccles Meadowhead SP TRANSMISSION LTD Carradale Kilmarnock Galashiels31 South Coalburn Galashiels Ayr 1172 Clyde (North) Coylton Clyde (South) 1614 Elvanfoot Hawick Harestanes Maybole Moffat Auchenwynd New Cumnock Moffat Hadyard Harestanes Kendoon 1625 366 Carsfad 49 Markhill To Northern Ireland Glenlee Gretna Blyth Arecleoch Kilgallioch Earlstoun Dumfries Ecclefechan Auchencrosh Fourstones Newton Stewart Tynemouth Chapelcross1578 Harker South Shields 68 48 Stella West Tongland West Boldon Glenluce Offerton Hawthorne Pit Hartmoor Spennymoor Hartlepool Saltholme Tod Point Teesside Norton Robin Rigg Greystones Grangetown 2260 1496 Lackenby

1398 Hutton 1639 Ormonde

Walney I & II Quernmore Heysham Osbaldwick Knaresborough West of Duddon Sands Middleton Barrow Bradford Thornton Hornsea West Kirkstall Skelton Poppleton Creyke Beck Westermost Rough Stanah Padiham Grange Monk 984 Fryston1858 Saltend North Hedon Penwortham Drax Humber Gateway 506 Elland Saltend South Eggborough Rochdale Ferrybridge To Ireland 1214 To Ireland Washway Keadby Humber Refinery Thorpe Burbo Bank Farm Kearsley Whitegate Templeborough Killingholme Kirkby 860 West Marsh South Stalybridge Melton Humber Grimsby West Gwynt y Mor Carrington Pitsmoor West Wylfa Rainhill Stocksbridge Aldwarke Bank Birkenhead Winco Bank Burton Bredbury Neepsend Thurcroft Rhyl Flats Fiddlers North Hoyle RocksavageRocksavage Daines Sheffield City Ferry Cottam Brinsworth Inner Dowsing Race Bank Dudgeon Capenhurst Frodsham Jordanthorpe Bodelwyddan Flintshire Norton Lees Pentir Bridge Macclesfield Chesterfield Lincs High Dinorwig South Manchester Connah’1219s Quay Marnham Sheringham Shoal East Anglia 1927 Staythorpe Lynn Legacy Ffestiniog Cellarhead Stoke Bardolph 641 Bicker Fen 577 Ratcliffe 2310 Willington on Soar Trawsfynydd 468 2494 Drakelow Walpole Rugeley Spalding1167 Ryhall North Necton Ironbridge Sutton Norwich Main Bushbury Bridge Scroby Sands Willenhall Bustleholm Shrewsbury Penn Enderby Nechells Hams Hall Ocker Hill 1832 Coventry 1637 Oldbury 1234 Kitwell Berkswell 211

Burwell Main Sizewell Feckenham Grendon Bishops Wood Eaton 456 Socon 1765 Patford Bramford Bridge 1023 739 Greater Gabbard 500MW 192 Sundon East Claydon Pelham Braintree Wymondley Leighton Buzzard Greater Gabbard 2nd part Rassau 685 Walham Waltham 725 Rye House Cross Imperial Brimsdown Park Gunfleet Sands I&II Cowley 753 Swansea North 242 Watford Elstree Hackney To Netherlands Pembroke Amersham Main London Array Cilfynydd Culham Tottenham Redbridge Rayleigh Main Baglan Bay Mill Hill Warley Upper Boat Uskmouth Minety Didcot Margam Iron Acton Willesden Barking Coryton Alpha Steel Whitson Iver Ealing Pyle West Ham City Rd West Thurrock Tilbury Grain Hurst Seabank St Johns Kentish Flats 470 Wood New Northfleet Thanet Tremorfa Laleham Kingsnorth 918 East Singlewell Kemsley Cleve Hill Aberthaw Cardiff Melksham Chessington Cross East Bramley West Weybridge Rowdown Littlebrook 2144 Beddington Canterbury 484 Fleet Wimbledon 238 North 716 Hinkley Point Sellindge West Sellindge Bridgwater Alverdiscott 63 1086 Bolney 637 Taunton Nursling 912 1553 Dungeness Mannington Marchwood Lovedean Ninfield 242 Axminster 1212 15 Fawley Botley Wood Exeter 87 To France

202 Chickerell Rampion

Langage Abham

Indian Queens Landulph

To France 5 Figure C4: GB Power Flow Diagram Gone Green 2022/23

400kV Substations 275 kV Substations 132kV Substations Offshore AC Platform Offshore DC Platform 400kV Circuits 275kV Circuits 220kV Circuits 132kV Circuits Offshore AC Cable Offshore DC Cable Interconnectors Dounreay Thurso Reconductor Circuit Spittal 400 160 Mybster New Circuit Cassley Beatrice Stornoway Dunbeath 1234 Power Flow MW 240 Lairg Flow Direction Loch Buidhe Moray Firth Brora Harris Loch Buidhe Shin Major Generating Sites Including Pumped Storage

280 Connected at 400kV Mossford Grudie Bridge Connected at 275 kV Fyrish Alness Corriemoillie Fraserburgh Hydro Generation Luichart Orrin Elgin Macduff St. Fergus Ardmore Deanie 35 Keith Culligran Dingwall Strichen Nairn Blackhillock 470 Offshore Wind Projects (as of 2016 - OCT - TEC) Aigas Kilmorack Inverness Dunvegan Peterhead Beauly 270 940 360 Knocknagael Fasnakyle Dyce Round 1 Kintore Persley Glen Broadford 50 Morrison Woodhill Willowdale Round 2 Caennacroc Foyers Clayhills Fort Augustus Boat of Quoich Garten Tarland Glendoe Craigiebuckler Redmoss Scottish Territorial Waters Sites Invergarry 1350

Kinlochleven Round 3 Tummel Fiddes

Fort William Errochty Power Station 760 Errochty 1060 Rannoch 50 Clunie Tummel Bridge Tealing Dudhope Arbroath Lochay Cashlie Lyndhurst Milton of Craigie Taynuilt Killin Charleston Dalmally Finlarig Inch Cape Cruachan Glenagnes Dudhope 1630 Burghmuir 1000 St. Fillans Nant Clachan Inverarnan SCOTTISH HYDRO-ELECTRIC Neart na Gaolthe North Argyll 1070 Cupar Inveraray Sloy TRANSMISSION Glenrothes Firth of Forth 340 Leven 150 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 To Norway Erskine Lambhill Whitehouse Devol Easterhouse Fallago Smeaton Moor Coatbridge Livingston Newarthill Currie Kaimes Crossaig 1743 Hunterston Neilston Clydes Mill 169Black Law Extension NorthHunterston Strathaven Dunlaw Extension Berwick 206 East Black Law Marshall Meadows Busby East 715 Kilwinning Whitelee Wishaw Hunterston Kilmarnock Kilbride Saltcoats Town Whitelee ExtnSouth CoalburnLinnmill Eccles Meadowhead SP TRANSMISSION LTD Carradale Kilmarnock Galashiels61 South Coalburn Galashiels Ayr 1666 Clyde (North) Coylton Clyde (South) 2554 Elvanfoot Hawick Harestanes Maybole Moffat Auchenwynd New Cumnock Moffat Hadyard Harestanes Kendoon 2112 Dogger Bank 130 Carsfad 447447 Markhill To Northern Ireland Glenlee Gretna Blyth Arecleoch Kilgallioch Earlstoun Dumfries Ecclefechan Auchencrosh Fourstones Newton Stewart Tynemouth Chapelcross2061 Harker South Shields 209 Stella West Tongland West Boldon Glenluce Offerton Hawthorne Pit Hartmoor Spennymoor Hartlepool Saltholme Tod Point Teesside Norton Robin Rigg Greystones Grangetown 2260 1826 Lackenby

1333 Hutton 1547 Ormonde

Walney I & II Quernmore Heysham Osbaldwick Knaresborough West of Duddon Sands Middleton Barrow Bradford Thornton Hornsea West Kirkstall Skelton Poppleton Creyke Beck Westermost Rough Stanah Padiham Grange Monk 424 Fryston2266 Saltend North Hedon Penwortham Drax Humber Gateway 482 Elland Saltend South Eggborough Rochdale Ferrybridge To Ireland 1389 To Ireland Washway Keadby Humber Refinery Burbo Bank Farm Kearsley Templeborough Thorpe Whitegate Killingholme Triton Knoll Kirkby 883 West Marsh South Stalybridge Melton Humber Grimsby West Gwynt y Mor Carrington Pitsmoor West Wylfa Rainhill Stocksbridge Aldwarke Bank Birkenhead Winco Bank Burton Bredbury Neepsend Thurcroft Rhyl Flats Fiddlers To Denmark North Hoyle RocksavageRocksavage Daines Sheffield City Ferry Cottam Brinsworth Inner Dowsing Race Bank Dudgeon Capenhurst Frodsham Jordanthorpe Bodelwyddan Flintshire Norton Lees Pentir Bridge Macclesfield Chesterfield Lincs High Dinorwig South Manchester Connah’s867 Quay Marnham Sheringham Shoal East Anglia 1643 Staythorpe Lynn Legacy Ffestiniog Cellarhead Stoke Bardolph 272 Bicker Fen 555 Ratcliffe 2074 Willington on Soar Trawsfynydd 1064 1989 Drakelow Walpole Rugeley Spalding2082 Ryhall North Necton Ironbridge Sutton Norwich Main Bushbury Bridge Scroby Sands Willenhall Bustleholm Shrewsbury Penn Enderby Nechells Hams Hall Ocker Hill 2136 Coventry 1463 Oldbury 1205 Kitwell Berkswell 266

Burwell Main Sizewell Feckenham Grendon Bishops Wood Eaton 247 Socon 2059 Patford Bramford Bridge 901 979 Greater Gabbard 500MW 58 Sundon East Claydon Pelham Braintree Wymondley Leighton Buzzard Greater Gabbard 2nd part Rassau 607 Walham Waltham Rye House Cross Imperial 489 Brimsdown Park Gunfleet Sands I&II Cowley 571 Swansea North 62 Watford Elstree Hackney To Netherlands Pembroke Amersham Main London Array Cilfynydd Culham Tottenham Redbridge Rayleigh Main Baglan Bay Mill Hill Warley Upper Boat Uskmouth Minety Didcot Margam Iron Acton Willesden Barking Coryton Alpha Steel Whitson Iver Ealing Pyle West Ham City Rd West Thurrock Tilbury Grain Hurst Seabank St Johns Kentish Flats 48 Wood New Northfleet Thanet Tremorfa Laleham Kingsnorth 537 East Singlewell Kemsley Cleve Hill Aberthaw Cardiff Melksham Chessington Cross

East West Weybridge Rowdown Bramley Littlebrook 3223 Beddington Canterbury 248 Fleet Wimbledon 666 North1680 Hinkley Point Sellindge West Sellindge Bridgwater Alverdiscott 481 1840 Bolney 148 Taunton Nursling 1622 1061 Dungeness Mannington Marchwood Lovedean Ninfield 636 Axminster 2004 234 Fawley Botley Wood Exeter 214 To France

157 Chickerell Rampion

Langage Abham

Indian Queens Landulph

To France To France 6 Figure C5: GB Power Flow Diagram Gone Green 2025/26

400kV Substations 275 kV Substations 132kV Substations Offshore AC Platform Offshore DC Platform 400kV Circuits 275kV Circuits To Shetland 220kV Circuits 132kV Circuits Offshore AC Cable Offshore DC Cable Interconnectors Dounreay Thurso 288 Reconductor Circuit Spittal 450 420 Mybster New Circuit Cassley Beatrice Stornoway Dunbeath 1234 Power Flow MW 250 Lairg Flow Direction Loch Buidhe Moray Firth Brora Harris Loch Buidhe Shin Major Generating Sites Including Pumped Storage

640 Connected at 400kV Mossford Grudie Bridge Connected at 275 kV Fyrish Alness Corriemoillie Fraserburgh Hydro Generation Luichart Orrin Elgin Macduff St. Fergus Ardmore Deanie 65 Keith Culligran Dingwall Strichen Nairn Blackhillock 980 Offshore Wind Projects (as of 2016 - OCT - TEC) Aigas Kilmorack Inverness Dunvegan Peterhead Beauly 550 1340 Knocknagael 590 Fasnakyle Dyce Round 1 Kintore Persley Glen Broadford 65 Morrison Woodhill Willowdale Round 2 Caennacroc Foyers Clayhills Fort Augustus Boat of Quoich Garten Tarland Glendoe Craigiebuckler Redmoss Scottish Territorial Waters Sites Invergarry 2000 1270

Kinlochleven Round 3 Tummel Fiddes

Fort William Errochty Power Station 440 Errochty 660 Rannoch 30 Clunie Tummel Bridge Tealing Dudhope Arbroath Lochay Cashlie Lyndhurst Milton of Craigie Taynuilt Killin Charleston Dalmally Finlarig Dudhope Inch Cape Cruachan Burghmuir Glenagnes 1573 870 St. Fillans Nant Clachan Inverarnan SCOTTISH HYDRO-ELECTRIC Neart na Gaolthe North Argyll 840 Cupar Inveraray Sloy TRANSMISSION Glenrothes Firth of Forth 370 Leven 160 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 To Norway Erskine Lambhill Whitehouse Devol Easterhouse Fallago Smeaton Branxton Moor Coatbridge Livingston Newarthill Currie Kaimes Crossaig 1979 Hunterston Neilston Clydes Mill 863Black Law Extension NorthHunterston Strathaven Dunlaw Extension Berwick 282174 East Black Law Marshall Meadows Busby East 465 Kilwinning Whitelee Wishaw Hunterston Kilmarnock Kilbride Saltcoats Town Whitelee ExtnSouth CoalburnLinnmill Eccles Meadowhead SP TRANSMISSION LTD Carradale Kilmarnock Galashiels42 South Coalburn Galashiels Ayr 2421 Clyde (North) Coylton Clyde (South) 3067 Elvanfoot Hawick Harestanes Maybole Moffat Auchenwynd New Cumnock Moffat Hadyard Harestanes Kendoon 3066 Dogger Bank 157 Carsfad 266366 Markhill To Northern Ireland Glenlee Gretna Blyth Arecleoch Kilgallioch Earlstoun Dumfries Ecclefechan Auchencrosh Fourstones Newton Stewart Tynemouth Chapelcross3001 Harker South Shields 220 Stella West Tongland West Boldon Glenluce Offerton Hawthorne Pit Hartmoor Spennymoor Hartlepool Saltholme Tod Point Teesside Norton Robin Rigg Greystones Grangetown 2260 3104 Lackenby

2714 Hutton 2991 Ormonde

Walney I & II Quernmore Heysham Osbaldwick Knaresborough West of Duddon Sands Middleton Barrow Bradford Thornton Hornsea West Kirkstall Skelton Poppleton Creyke Beck Westermost Rough Stanah Padiham Grange Monk 1424 Fryston4018 Saltend North Hedon Penwortham Drax Humber Gateway 393 Elland Saltend South Eggborough Rochdale Ferrybridge To Ireland 1515 To Ireland Washway Keadby Humber Refinery Burbo Bank Farm Kearsley Templeborough Thorpe Whitegate Killingholme Triton Knoll Kirkby 1045 West Marsh South Stalybridge Melton Humber Grimsby West Gwynt y Mor Carrington Pitsmoor West Wylfa Rainhill Stocksbridge Aldwarke Bank Birkenhead Winco Bank Burton Bredbury Neepsend Thurcroft Rhyl Flats Fiddlers To Denmark North Hoyle RocksavageRocksavage Daines Sheffield City Ferry Cottam Brinsworth Inner Dowsing Race Bank Dudgeon Capenhurst Frodsham Jordanthorpe Bodelwyddan Flintshire Norton Lees Pentir Bridge Macclesfield Chesterfield Lincs High Dinorwig South Manchester Connah’s416 Quay Marnham Sheringham Shoal East Anglia 3561 Staythorpe Lynn Legacy Ffestiniog Cellarhead Stoke Bardolph 317 Bicker Fen 721 Ratcliffe 2998 Willington on Soar Trawsfynydd 1506

2344 Drakelow Walpole Rugeley Spalding2292 Ryhall North Necton Ironbridge Sutton Norwich Main Bushbury Bridge Scroby Sands Willenhall Bustleholm Shrewsbury Penn Enderby Nechells Hams Hall Ocker Hill 3020 Coventry 2005 Oldbury 1806 Kitwell Berkswell 568

Burwell Main Sizewell Feckenham Grendon Bishops Wood Eaton 995 Socon 2927 To Ireland Patford Bramford Bridge 1381 Greater Gabbard 500MW 1170 Sundon 1057 East Claydon Pelham Braintree Wymondley Leighton Buzzard Greater Gabbard 2nd part Rassau 11 Walham Waltham Rye House Cross Imperial 1811 Brimsdown Park Gunfleet Sands I&II Cowley 1444 Swansea North 326 Watford Elstree Hackney To Netherlands Pembroke Amersham Main London Array Cilfynydd Culham Tottenham Redbridge Rayleigh Main Baglan Bay Mill Hill Warley Upper Boat Uskmouth Minety Didcot Margam Iron Acton Willesden Barking Coryton Alpha Steel Whitson Iver Ealing Pyle West Ham City Rd West Thurrock Tilbury Grain Hurst Seabank St Johns Kentish Flats 969 Wood New Northfleet Thanet Tremorfa Laleham Kingsnorth 76 East Singlewell Kemsley Cleve Hill Aberthaw Cardiff Melksham Chessington Cross

East West Weybridge Rowdown Bramley Littlebrook 1177 Beddington Canterbury 252 Fleet Wimbledon 243 North 774 Hinkley Point Sellindge West Sellindge Bridgwater Alverdiscott 165 1024 Bolney 707 Taunton Nursling 1820 1602 Dungeness Mannington Marchwood Lovedean Ninfield 11 Axminster 2400 12 Fawley Botley Wood Exeter 377 To France

31 Chickerell Rampion

Langage Abham

Indian Queens Landulph

To France To France To France