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Transmission / Projects / England and Wales

Dinorwig

First Hydro Company at Dinorwig 400kV Substation

Connection date
Connected
Gate
Not stated
Status
Built
Planning consent
Operational since 1983
Gwynedd · Source: REPD
Technology
Pumped storage
Total capacity
1,644 MW
Connected now
1,644 MW
Still to connect
0 MW
Transmission owner
National Grid Electricity Transmission (NGET)
Agreement type
Direct Connection
Region
England and Wales
Project number
PRO-000054
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.

  • 23 Dec 2022 register
    Substation name updated in the register (from Dinorwig 400kV to Dinorwig 400kV Substation)

Also at Dinorwig 400kV Substation

Substation view

No other projects in the register at this connection point.

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.