Grid infrastructure › Connection queue › Offshore wind
OFFSHORE WIND · SPTSeagreen Phase 1A
Seagreen Phase 1A is a 500 MW offshore wind project under construction or commissioning, connecting to the SP Transmission (south Scotland) network at Cockenzie 400/275kV, with capacity due from April 2028. The connection agreement is held by Seagreen 1A Limited.
Project stageUnder construction
- Planning (completed)
- Consented (completed)
- Construction (current stage)
- OperatingFrom Apr 2028 (not yet reached)
- Closed (not yet reached)
Connection details
- NESO project number
- PRO-000703
- Customer
- Seagreen 1A Limited
- Technology
- Wind Offshore
- Total capacity
- 500 MW
- Change in this agreement
- +500 MW
- Capacity effective from
- 1 April 2028
- Connection site
- Cockenzie 400/275kV
- Transmission owner
- SP Transmission (south Scotland)
- Connection type
- Direct connection to the transmission network
- NESO project status
- Under Construction/Commissioning
Connection site
The marker shows the connection substation, not the project itself, with the transmission network around it.
Other projects at Cockenzie 400/275kV
Source: NESO Transmission Entry Capacity (TEC) register, downloaded 8 November 2026. Contains data from NESO, licensed under the NESO Open Data Licence. Report a problem