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Delays and exits in the transmission queue since 2021How often connection dates move, and how many projects leave the queue. Gate 2 in the transmission queueHow much of the queue has a Gate 2 offer, and what it did to connection dates. The battery queue and CMP470’s commitment feeHow far the battery queue sits above the line that would switch CMP470’s commitment fee off. Changes of customer in the transmission queueHow often connection agreements move between companies, and how those projects fared. Do projects connect on time?How late stages have connected against their connection date in the register. Which connection dates slip least?Which connection dates are pushed back least, allowing for how far ahead they are. Grid outages and the connections due by 2030How many of their planned outages the transmission owners carry out, against the connections due by 2030.

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Transmission / Projects / South Scotland

Hunterston Battery Storage Facility

HUNTERSTON GRID 1 LTD at Hunterston East 400kV substation

Connection date
10 Mar 2028 +24 months since 9 Dec
Gate
Gate 2
Status
Consents Approved
Technology
Storage + Reactive compensation
Total capacity
200 MW
Connected now
0 MW
Still to connect
200 MW
Transmission owner
SP Energy Networks (SPT)
Agreement type
Direct Connection
Region
South Scotland
Project number
PRO-001155
In the register since
January 2021 or earlier

What would CMP470’s commitment fee do to a battery like this? See the use case: Will CMP470’s commitment fee clear the battery queue?

Change history

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

  • 18 Sep 2026 register
    Status changed from Scoping to Consents Approved
  • 16 Jun 2026 register
    Technology changed from Demand, Storage to Storage, Reactive compensation
  • 5 Jun 2026 register
    Connection point changed from Ayrshire Grid 400kV Substation to Hunterston East 400kV substation
  • 5 Jun 2026 register
    Connection date moved from 9 Mar 2026 to 10 Mar 2028 (+24 months)
  • 5 Jun 2026 register
    Given a Gate 2 connection offer
  • 12 May 2026 register
    Customer changed from FLEXIBLEGRIDPOWER2 LTD to HUNTERSTON GRID 1 LTD
  • 21 Nov 2025 register
    Connection date moved from 20 Aug 2025 to 9 Mar 2026 (+7 months)
  • 29 Jul 2025 register
    Technology changed from Storage, Reactive compensation to Demand, Storage
  • 29 Apr 2025 register
    Connection date moved from 12 Apr 2024 to 20 Aug 2025 (+16 months)
  • 31 May 2024 register
    Connection date moved from 16 Apr 2024 to 12 Apr 2024 (4 days earlier)
  • 26 Apr 2024 register
    Connection date moved from 16 Dec 2024 to 16 Apr 2024 (−8 months)
  • 27 Feb 2024 register
    Connection date moved from 12 Apr 2024 to 16 Dec 2024 (+8 months)
  • 23 Dec 2022 register
    Substation name updated in the register (from Ayrshire Grid 400 kV Substation to Ayrshire Grid 400kV Substation)
  • 30 Nov 2021 register
    Technology changed from Storage to Storage, Reactive compensation
  • 28 Sep 2021 register
    Connection point changed from Hunterston 400kV Substation to Ayrshire Grid 400 kV Substation
  • 30 Apr 2021 register
    Technology changed from Storage, Reactive compensation to Storage
  • 26 Feb 2021 register
    Connection date moved from 4 Dec 2024 to 12 Apr 2024 (−8 months)

Also at Hunterston East 400kV

Substation view

1 other project, 400 MW still to connect at this substation in total. 200 MW is due to connect here before this project’s connection date of 10 Mar 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