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Transmission / Projects / South Scotland

Seagreen Phase 1A

SEAGREEN 1A LIMITED at Cockenzie 400/275kV

Connection date
1 Apr 2028
Gate
Not stated
Status
Under Construction/Commissioning
Planning consent
Granted 6 Dec 2019
Marine Scotland · Source: REPD
Technology
Offshore wind
Total capacity
500 MW
Connected now
0 MW
Still to connect
500 MW
Transmission owner
SP Energy Networks (SPT)
Agreement type
Direct Connection
Region
South Scotland
Project number
PRO-000703
In the register since
January 2021 or earlier

Change history

Every change to this project across 151 registers from 29 Jan 2021 to 5 Nov 2026.

  • 16 Dec 2025 register
    Renamed from Seagreen 1A Offshore Wind Farm
  • 31 Jan 2025 register
    Connection date moved from 1 Apr 2026 to 1 Apr 2028 (+24 months)
  • 29 Oct 2024 register
    Connection point changed from Cockenzie 400/275/33kV to Cockenzie 400/275kV
  • 27 Sep 2024 register
    Connection point changed from Cockenzie 275kV Substation to Cockenzie 400/275/33kV
  • 31 Oct 2023 register
    Connection date moved from 25 Feb 2024 to 1 Apr 2026 (+25 months)
  • 29 Sep 2023 register
    Status changed from Scoping to Under Construction/Commissioning
  • 31 Mar 2023 register
    Connection date moved from 17 Nov 2023 to 25 Feb 2024 (+3 months)
  • 23 Dec 2022 register
    Connection point changed from Seagreen Phase 1A 275kV/66kV Offshore Substation to Cockenzie 275kV Substation
  • 31 Dec 2021 register
    Renamed from Seagreen Project 1+
  • 31 Aug 2021 register
    Connection point changed from Seagreen Platform 1+ 275kV/66kV Offshore Substation to Seagreen Phase 1A 275kV/66kV Offshore Substation
  • 31 Aug 2021 register
    Capacity changed from 360 MW to 500 MW
  • 31 Aug 2021 register
    Connection date moved from 27 Oct 2023 to 17 Nov 2023 (+1 month)

Also at Cockenzie 400/275kV

Substation view

2 other projects, 1.3 GW still to connect at this substation in total. 540 MW is due to connect here before this project’s connection date of 1 Apr 2028.

Status definitions (NESO)

Scoping: NESO is not aware that a planning application has been made.

Awaiting Consents: NESO is aware, or the customer has told it, that a planning application has been made.

Consents Approved: NESO is aware, or the customer has told it, that the planning application has been approved.

Terminated: used by NESO only in its register of 30 April 2021, for two projects that left the register the next month.

These statuses are NESO’s, not QueueWatch’s, and NESO describes them as “as far as we are aware”, so a project may be further along than its status shows.

Source: NESO

Planning consent

The planning decision or stage for this project, from DESNZ’s Renewable Energy Planning Database (REPD), July 2026 edition, with the planning authority and its reference. QueueWatch matched the project to that record. NESO’s status can lag behind planning decisions, so the two may differ.

How QueueWatch matches projects · Spotted a wrong match? Email info@queuequant.com.