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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 / England and Wales

Cwm Dyli

RWE Generation UK Plc at Trawsfynydd 275kV Substation

Connection date
Connected
Gate
Not stated
Status
Built
Planning consent
Operational since 1906
Gwynedd · Source: REPD
Technology
Hydro
Total capacity
10 MW
Connected now
10 MW
Still to connect
0 MW
Transmission owner
National Grid Electricity Transmission (NGET)
Agreement type
Embedded
Region
England and Wales
Project number
PRO-000115
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
    Connection point changed from Trawfynydd to Trawsfynydd 275kV Substation

Also at Trawsfynydd 275kV Substation

Substation view

1 other project, 940 MW 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

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.

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