QueueWatchby QueueQuant Price my project Get the plan that holds up best for your site, and where that answer flips.
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.

More analyses are on the way.

Transmission / Projects / England and Wales

Port of Mostyn

MOSTYN SEAPOWER LIMITED at Connah's Quay 400kV Substation

Connection date
1 Dec 2030
Gate
Gate 1
Status
Scoping
Technology
Tidal
Total capacity
210 MW
Connected now
0 MW
Still to connect
210 MW
Transmission owner
National Grid Electricity Transmission (NGET)
Agreement type
Direct Connection
Region
England and Wales
Project number
PRO-000421
In the register since
January 2021 or earlier

Stages

StageConnected MWAdds MWCumulative MWDateGateStatus
1070701 Dec 2030Gate 1Scoping
20701401 Jun 2031Gate 1Scoping
30702101 Jan 2032Gate 1Scoping

Change history

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

  • 16 Jun 2026 register
    Stage 1: Marked as Gate 1
  • 16 Jun 2026 register
    Stage 2: Marked as Gate 1
  • 16 Jun 2026 register
    Stage 3: Marked as Gate 1
  • 27 Jun 2025 register
    Stage 2: Capacity changed from 140 MW to 70 MW
  • 27 Jun 2025 register
    Stage 3: Capacity changed from 210 MW to 70 MW
  • 28 Feb 2025 register
    Restructured from 1 stage (210 MW from 1 Apr 2027) to 3 stages (70 MW from 1 Dec 2030, 140 MW from 1 Jun 2031, 210 MW from 1 Jan 2032). First connection date +44 months
  • 23 Dec 2022 register
    Substation name updated in the register (from Connah's Quay 400kV to Connah's Quay 400kV Substation)
  • 31 May 2022 register
    Connection date moved from 1 Apr 2025 to 1 Apr 2027 (+24 months)
  • 30 Apr 2021 register
    Connection date moved from 1 Apr 2024 to 1 Apr 2025 (+12 months)
  • 26 Feb 2021 register
    Connection date moved from 4 Jan 2024 to 1 Apr 2024 (+3 months)

Also at Connah's Quay 400kV Substation

Substation view

3 other projects, 1.4 GW still to connect at this substation in total. 189 MW is due to connect here before this project’s connection date of 1 Dec 2030.

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