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

Sundon

SUNDON BATTERY STORAGE LIMITED at Sundon 400kV Substation

Connection date
30 Apr 2027 +20 months since 9 Dec
Gate
Gate 2
Status
Under Construction/Commissioning
Technology
Storage
Total capacity
50 MW
Connected now
0 MW
Still to connect
50 MW
Transmission owner
National Grid Electricity Transmission (NGET)
Agreement type
Direct Connection
Region
England and Wales
Project number
PRO-001132
In the register since
January 2021 or earlier

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?

Change history

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

  • 20 Oct 2026 register
    Connection date moved from 5 Sep 2025 to 30 Apr 2027 (+20 months)
  • 20 Oct 2026 register
    Status changed from Scoping to Under Construction/Commissioning
  • 20 Oct 2026 register
    Given a Gate 2 connection offer
  • 28 Mar 2025 register
    Capacity changed from 49.5 MW to 50 MW
  • 28 Mar 2025 register
    Connection date moved from 1 May 2024 to 5 Sep 2025 (+16 months)
  • 23 Dec 2022 register
    Substation name updated in the register (from Sundon 400kV to Sundon 400kV Substation)
  • 31 May 2022 register
    Customer changed from CSE21 LIMITED to SUNDON BATTERY STORAGE LIMITED
  • 31 May 2022 register
    Connection date moved from 10 May 2024 to 1 May 2024 (9 days earlier)
  • 31 Dec 2021 register
    Technology changed from Gas (CCGT) to Storage
  • 31 Aug 2021 register
    Connection date moved from 13 Oct 2023 to 10 May 2024 (+7 months)
  • 28 May 2021 register
    Connection date moved from 1 Jul 2022 to 13 Oct 2023 (+15 months)
  • 26 Feb 2021 register
    Connection date moved from 7 Jan 2022 to 1 Jul 2022 (+6 months)

Also at Sundon 400kV Substation

Substation view

3 other projects, 1.2 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