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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

Twyn Hywel Cillfynydd

Twyn Hywel Energy Park Ltd at Cilfynydd 400kV Substation

Connection date
1 Apr 2027
Gate
Not stated
Status
Scoping
Planning consent
Granted 5 Nov 2024
Welsh Government (NSIP), reference DNS/3272053 · Source: REPD
Contract for Difference
Allocation Round 7a
Technology
Onshore wind
Total capacity
108 MW
Connected now
0 MW
Still to connect
108 MW
Transmission owner
National Grid Electricity Transmission (NGET)
Agreement type
Direct Connection
Region
England and Wales
Project number
PRO-001497
In the register since
June 2021

Change history

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

  • 29 Jul 2025 register
    Capacity changed from 160 MW to 108 MW
  • 29 Jul 2025 register
    Connection date moved from 31 Mar 2026 to 1 Apr 2027 (+12 months)
  • 24 Dec 2024 register
    Connection date moved from 30 Jun 2025 to 31 Mar 2026 (+9 months)
  • 29 Jun 2021 register
    Added to the register

Also at Cilfynydd 400kV Substation

Substation view

8 other projects, 3 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

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.

Contract for Difference

The Contracts for Difference allocation round for this project, from DESNZ’s Renewable Energy Planning Database (REPD), July 2026 edition. QueueWatch matched the project to that record.

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