GB transmission connections

TEC register (GB transmission entry capacity)

Rare Context lists 300 projects in the TEC register, with 354,282 MW of capacity between them. The largest is Bute Hydrogen Project 1 grid connection (4,800 MW). These are the 300 largest of the 2,083 projects in NESO's TEC register of 22 Oct 2026 (2,226 rows: the stages of one agreement are one project here), down to 600 MW, with the holder and the technology of each. We keep only the largest; the other 1,783 are in the register itself, linked below.

The 100 largest projects

Sorted by capacity.

Grid connection	Region	Holder	Capacity
Bute Hydrogen Project 1 grid connection	England	Haldane Energy Project 1 Limited	4,800 MW
Drax BECCS grid connection	England	Drax Power Limited	3,906 MW
Drax Power Station grid connection	England	Drax Power Limited	3,906 MW
Bute Hydrogen Project 2 grid connection	England	Haldane Energy Project 2 Limited	3,600 MW
Bute Hydrogen Project 3 grid connection	England	Haldane Energy Project 3 Limited	3,600 MW
Bute Hydrogen Project 5 grid connection	England	Haldane Energy Project 5 Limited	3,600 MW
Bute Hydrogen Project 6 grid connection	England	Haldane Energy Project 6 Limited	3,600 MW
Hinkley Point C grid connection	England	NNB Generation Company Limited	3,340 MW
Sizewell C grid connection	England	Sizewell C Limited	3,340 MW
Hornsea Power Station 3 grid connection	England	Hornsea Project Three (UK) Limited	3,000 MW
Marram Wind Offshore Wind Farm grid connection	Scotland	Marramwind Limited	3,000 MW
Hornsea Power Station 4 grid connection	England	Orsted Hornsea Project Four Limited	2,600 MW
Portwind grid connection	England	SE Portwind Ltd	2,500 MW
Eggborough CCGT - OCGT - BESS grid connection	England	Eggborough Power Limited	2,450 MW
Bute Hydrogen Project 4 grid connection	England	Haldane Energy Project 4 Limited	2,400 MW
Bute Hydrogen Project 7.1 grid connection	England	Haldane Energy Project 7 Limited	2,400 MW
Heysham Power Station grid connection	England	EDF Energy Nuclear Generation Limited	2,363 MW
OWPL Windfarm grid connection	Scotland	Offshore Wind Power Limited	2,250 MW
Pembroke Power Station grid connection	Wales	RWE Generation	2,199 MW
East Claydon Green Energy Centre grid connection	England	East Claydon Green NG Limited	2,050 MW
Caledonia Offshore Wind Farm grid connection	Scotland	Caledonia Offshore Wind Farm Limited	2,000 MW
Gallos grid connection	England	Corio Generation Limited	2,000 MW
Machair Offshore Wind Farm grid connection	Scotland	Scottish Power Renewables	2,000 MW
Walpole Flexible Generation grid connection	England	Walpole Flexible Generation Limited	2,000 MW
West Burton B grid connection	England	West Burton B Limited	1,881 MW
Arven Offshore Wind Farm grid connection	Scotland	Arven Offshore Wind Farm Limited	1,800 MW
Bellrock Offshore Wind Farm grid connection	Scotland	Bellrock Offshore Wind Farm Limited	1,800 MW
Berwick Bank Offshore Wind Farm C grid connection	England	Berwick Bank C Limited	1,800 MW
Carrington Lane BESS grid connection	England	Apatura Battery Ltd	1,800 MW
Damhead Creek 2 grid connection	England	VPI Power Limited	1,800 MW
Earba PSH grid connection	Scotland	Earba Limited	1,800 MW
Glen Earrach PSH grid connection	Scotland	Glen Earrach Energy Limited	1,800 MW
North-East Offshore Hybrid Asset grid connection	Scotland	National Grid Interconnector Holdings Limited	1,800 MW
NatPower Enderby - Patford Bridge Green Energy Park grid connection	England	Enderby Energy Limited	1,799 MW
Staythorpe C grid connection	England	RWE Generation	1,752 MW
Didcot B grid connection	England	RWE Generation	1,705 MW
Dinorwig grid connection	Wales	First Hydro Company	1,644 MW
Springwell grid connection	England	Springwell Energy Farm Limited	1,600 MW
Grain grid connection	England	Uniper	1,517 MW
GT R4 Offshore Wind Farm grid connection	England	GT R4 Limited	1,500 MW
Havbredey grid connection	Scotland	Havbredey Limited	1,500 MW
Mablethorpe Storage grid connection	England	Theddlethorpe Flexible Generation Limited	1,500 MW
Merlin 2 Offshore Windfarm grid connection	England	Offshore Wind Limited	1,500 MW
Mona Offshore Wind Farm grid connection	Wales	Mona Offshore Wind Limited	1,500 MW
Morgan Offshore Wind Farm grid connection	England	Morgan Offshore Wind Limited	1,500 MW
Morven A Offshore Wind Farm (Prev Phoenix 1A) grid connection	England	Morven Offshore Wind Limited	1,500 MW
Nursling Flexible Generation grid connection	England	South Eng Flexible Generation Limited	1,500 MW
Old Flatts Farm grid connection	England	Net Zero One Ltd	1,500 MW
Phoenix 1B Offshore Wind Farm grid connection	Scotland	Morven Offshore Wind Limited	1,500 MW
SSE Celtic Sea 1 grid connection	England	SSE Renewables Offshore Windfarm Holdings Limited	1,500 MW
Stromar Offshore Windfarm grid connection	Scotland	Stromar Offshore Wind Farm Limited	1,500 MW
Torridge Offshore Wind Farm grid connection	—	Gwynt Glas Offshore Wind Farm Limited	1,500 MW
Fearna PSH 2 grid connection	Scotland	Fearna PSH Limited	1,495 MW
Dogger Bank D Offshore Wind Farm grid connection	England	Doggerbank Offshore Wind Farm Project 4 Projco Limited	1,450 MW
Dogger Bank South East grid connection	England	RWE Renewables UK Dogger Bank South (East) Limited	1,450 MW
Dogger Bank South West grid connection	England	RWE Renewables UK Dogger Bank South (West) Limited	1,450 MW
Ferrybridge D grid connection	England	Keadby Generation Limited	1,420 MW
INTOG 2 grid connection	Scotland	Cerulean Winds Limited	1,400 MW
Overton Solar & Storage Farm grid connection	England	Elements Green	1,400 MW
South Humber Bank grid connection	England	EP UK Power Development II Ltd	1,400 MW
Tealing Energy Park grid connection	Scotland	OnPath Energy Limited	1,400 MW
Thorpe Marsh Energy Park grid connection	England	Thorpe Marsh Green Energy Hub Limited	1,400 MW
Trafford 2 BESS grid connection	England	Future Point Manchester Limited	1,400 MW
Berwick Bank Offshore Wind Farm A grid connection	Scotland	Berwick Bank A Limited	1,380 MW
Berwick Bank Offshore Wind Farm B grid connection	Scotland	Berwick Bank B Limited	1,380 MW
Connah's Quay grid connection	Wales	Uniper	1,380 MW
CENOS grid connection	Scotland	Flotation Energy	1,350 MW
Scira-Dudgeon Extension grid connection	England	Sheringham Shoal and Dudgeon Extensions Projco Limited	1,350 MW
NatPower Kinoulton Green Energy Park grid connection	England	Dalby Energy Limited	1,330 MW
East Anglia Three grid connection	—	East Anglia Three Limited	1,320 MW
Isle of Man Offshore Wind Farm grid connection	—	Mooir Vannin Offshore Wind Farm Limited	1,320 MW
Norfolk Boreas grid connection	England	Norfolk Boreas Limited	1,320 MW
Ossian 1 Offshore Wind Farm grid connection	Scotland	Ossian Offshore Wind Farm Limited	1,320 MW
Sofia Offshore Wind Farm grid connection	England	Sofia Offshore Wind Farm Limited	1,320 MW
Vanguard East grid connection	England	Norfolk Vanguard East Ltd	1,320 MW
Vanguard grid connection	England	Norfolk Vanguard Limited	1,320 MW
Immingham grid connection	England	VPI Immingham LLP	1,318 MW
Coire Glas Pumped Storage grid connection	Scotland	Coire Glas Hydro Pumped Storage Limited	1,296 MW
Little Horsted Energy Park grid connection	England	Elements Green Development Ltd	1,260 MW
Cold Norton grid connection	England	BSR Applications Limited	1,250 MW
Torness grid connection	Scotland	EDF Energy Nuclear Generation Limited	1,250 MW
Seabank grid connection	England	Seabank Power Limited	1,234 MW
Sizewell B grid connection	England	EDF Energy Nuclear Generation Limited	1,230 MW
Dogger Bank Project 4 (Dogger Bank B) grid connection	—	Doggerbank Offshore Wind Farm Project 2 Projco Limited	1,200 MW
Dogger Bank Project A grid connection	—	Doggerbank Offshore Wind Farm Project 1 Projco Limited	1,200 MW
Dogger Bank Project C grid connection	England	Doggerbank Offshore Wind Farm Project 3 Projco Limited	1,200 MW
Legacy Green Energy Centre grid connection	Wales	Legacy Green Energy Limited	1,200 MW
Rampion Extension Offshore Wind Farm grid connection	England	Rampion Extension Development Limited	1,200 MW
The Beacon grid connection	England	Beacon Solar Limited	1,200 MW
Vicarage Drove BESS grid connection	England	UK Transition Power Holdings Limited	1,200 MW
Hartlepool grid connection	England	EDF Energy Nuclear Generation Limited	1,197 MW
Peterhead grid connection	Scotland	SSE Thermal Generation (Scotland) Limited	1,180 MW
Awel Y Mor grid connection	Wales	Awel y Mor Offshore Wind Farm Limited	1,100 MW
Saltend grid connection	England	Saltend Cogeneration Company Limited	1,100 MW
Five Estuaries Offshore Wind Farm grid connection	—	Five Estuaries Offshore Wind Farm Ltd	1,080 MW
Seagreen 1 Offshore Wind Farm grid connection	Scotland	Seagreen Wind Energy	1,075 MW
Bradwell Energy Park grid connection	England	Dengie Peninsula Energy Park	1,050 MW
Butlers Wood Green Energy Centre grid connection	England	Butlers Wood NG Limited	1,025 MW
Cilfynydd Green Energy Centre grid connection	Wales	Cilfynydd NG Limited	1,025 MW
Drakelow Green Energy Centre grid connection	England	Drakelow NG Limited	1,025 MW

By technology

Battery storage167 · 169,434 MW
Solar114 · 108,010 MW
Wind101 · 124,837 MW
Gas48 · 68,919 MW
Nuclear23 · 29,660 MW
Pumped storage7 · 9,595 MW
Hydroelectric3 · 4,619 MW
Biomass2 · 7,812 MW

By region

England217 · 257,755 MW
Scotland50 · 60,755 MW
Region not recorded17 · 17,434 MW
Wales16 · 18,338 MW

The 300 projects we hold in the TEC register, with holders.All 300 in one file, each with its capacity and connection date. We research what the public sources leave out.

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Data on this page

Supported by National Energy SO Open Data. NESO TEC Register, NESO Open Data Licence v1.0.