Hydro and pumped storage projects in the connection queue on the SP Transmission (south Scotland) 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.

Projects shown2678 MW in total

In planning2scoping or awaiting consent

Consented or building2closest to connecting

Built2connected and operating

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Source: NESO TEC and interconnector registers, downloaded 8 November 2026. Map points are the connection substation, not the project site.

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Connection queue Existing circuits Major grid projects

Voltage400 kV275 kV132 kVHVDCNew HVAC

ProjectsPlanningConsentedConstructionBuiltMajor project with its own page

Projects

2 projects

Project	Capacity	Stage	Connection site	From
Cruachan U3&4 Replacement Hydro and pumped storage · Drax Pumped Storage Limited	440 MW	Built	Cruachan 275kV Substation SP Transmission (south Scotland)
Whitelee Extension Hydro and pumped storage · Scottish Power Renewables (UK) Limited	238 MW	Built	Whitelee Extension 275/33kV SP Transmission (south Scotland)	Dec 2026

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 “connection nodes” are listed but not mapped.