Home βΊ Grid infrastructure βΊ Connection queue
NESO TEC REGISTER Β· GREAT BRITAINHydro and pumped storage projects in the connection queue on the National Grid (England & Wales) network
Every generator, battery and interconnector with an agreement to connect to the GB transmission network, from early scoping to built. Filter by technology, stage or network, and open a project for its connection details.
Map
Voltage400 kV275 kV132 kVHVDCNew HVAC
ProjectsPlanningConsentedConstructionBuiltMajor project with its own page
Projects
| Project | Capacity | Stage |
|---|---|---|
| Pembroke Power Station Hydro and pumped storage Β· RWE Generation UK Plc |
2.2 GW | |
| Dinorwig Hydro and pumped storage Β· First Hydro Company |
1.6 GW | |
| Ffestiniog Hydro and pumped storage Β· First Hydro Company |
360 MW | |
| Cwm Rheidol Hydro and pumped storage Β· Statkraft Energy Ltd. |
50 MW | |
| Dolgarrog Hydro and pumped storage Β· RWE Generation UK Plc |
39 MW | |
| Maentwrog Hydro and pumped storage Β· Nuclear Decommissioning Authority |
30 MW | |
| Cwm Dyli Hydro and pumped storage Β· RWE Generation UK Plc |
10 MW |
Sources: NESO Transmission Entry Capacity (TEC) register and interconnector register (downloaded 8 November 2026); NESO Clean Power 2030 network map (existing and planned circuits, substations and network projects); National Grid Electricity Transmission overhead line routes. Contains data from NESO, licensed under the NESO Open Data Licence, and National Grid open data. Projects are placed at their connection substation, not the generating site; projects at new, unnamed βconnection nodesβ are listed but not mapped.