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Transmission / Projects / North Scotland

Longhaven Energy Storage Centre

Hydrostor UK Ltd at New North East Substation 400kV Substation

Connection date
31 Oct 2037
Gate
Gate 1
Status
Scoping
Technology
Storage + Pumped storage + Thermal
Total capacity
500 MW
Connected now
0 MW
Still to connect
500 MW
Transmission owner
SSEN Transmission (SHET)
Agreement type
Direct Connection
Region
North Scotland
Project number
PRO-006133
In the register since
July 2025

Change history

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

  • 10 Mar 2026 register
    Marked as Gate 1
  • 20 Feb 2026 register
    Connection point changed from Longside 400kV Substation to New North East Substation 400kV Substation
  • 29 Jul 2025 register
    Added to the register

Also at New North East Substation 400kV Substation

Substation view

2 other projects, 1.4 GW still to connect at this substation in total.

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