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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

Cilfynydd Green Energy Centre

CILFYNYDD NG LIMITED at Cilfynydd 400kV Substation

Connection date
30 Oct 2029 +12 months since 9 Dec
Gate
Gate 1
Status
Awaiting Consents
Technology
Demand + Storage + Solar + Onshore wind
Total capacity
1,025 MW
Connected now
0 MW
Still to connect
1,025 MW
Transmission owner
National Grid Electricity Transmission (NGET)
Agreement type
Direct Connection
Region
England and Wales
Project number
PRO-001663
In the register since
October 2021

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?

Stages

StageConnected MWAdds MWCumulative MWDateGateStatus
1040040030 Oct 2029Gate 1Awaiting Consents
206251,02531 Oct 2033Gate 1Awaiting Consents

Change history

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

  • 1 Oct 2026 register
    Stage 1: Connection date moved from 30 Oct 2028 to 30 Oct 2029 (+12 months)
  • 17 Apr 2026 register
    Stage 1: Marked as Gate 1
  • 17 Apr 2026 register
    Stage 2: Marked as Gate 1
  • 16 Jan 2026 register
    Customer changed from CILFYNYDD GREEN ENERGY LIMITED to CILFYNYDD NG LIMITED
  • 29 Jul 2025 register
    Stage 1: Technology changed from Demand, Storage, Solar to Demand, Storage, Solar, Onshore wind
  • 29 Jul 2025 register
    Stage 2: Technology changed from Demand, Storage, Solar to Demand, Storage, Solar, Onshore wind
  • 27 Jun 2025 register
    Customer changed from CILFYNYDD NG LIMITED to CILFYNYDD GREEN ENERGY LIMITED
  • 27 Jun 2025 register
    Stage 1: Technology changed from Storage, Solar to Demand, Storage, Solar
  • 27 Jun 2025 register
    Stage 2: Technology changed from Storage, Solar to Demand, Storage, Solar
  • 30 May 2025 register
    Renamed from CILFYNYDD NG LIMITED
  • 28 Mar 2025 register
    Renamed from Cilfynydd Green Energy Centre
  • 28 Mar 2025 register
    Customer changed from CILFYNYDD GREEN ENERGY LIMITED to CILFYNYDD NG LIMITED
  • 28 Jul 2023 register
    Restructured from 1 stage (1,025 MW from 30 Oct 2028) to 2 stages (400 MW from 30 Oct 2028, 625 MW from 31 Oct 2033)
  • 30 May 2023 register
    Capacity changed from 400 MW to 1,025 MW
  • 23 Dec 2022 register
    Substation name updated in the register (from Cilfynydd to Cilfynydd GSP)
  • 29 Oct 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. 418 MW is due to connect here before this project’s connection date of 30 Oct 2029.

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