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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.

More analyses are on the way.

Transmission / Projects / England and Wales

Elstree Energy Storage

ELSTREE BATTERY STORAGE LIMITED at Letchmore Heath 132kV Substation

Connection date
31 Jul 2030 +10 months since 9 Dec
Gate
Gate 1
Status
Scoping
Technology
Storage
Total capacity
170 MW
Connected now
0 MW
Still to connect
170 MW
Transmission owner
National Grid Electricity Transmission (NGET)
Agreement type
Direct Connection
Region
England and Wales
Project number
PRO-003205
In the register since
February 2023

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.

  • 10 Oct 2026 register
    Connection date moved from 1 Oct 2029 to 31 Jul 2030 (+10 months)
  • 9 Jun 2026 register
    Connection point changed from Elstree 132kV Substation to Letchmore Heath 132kV Substation
  • 8 May 2026 register
    Marked as Gate 1
  • 29 Aug 2025 register
    Customer changed from BW ESS Development UK Limited to ELSTREE BATTERY STORAGE LIMITED
  • 31 Jan 2025 register
    Customer changed from Penso Power Limited to BW ESS DEVELOPMENT UK LIMITED
  • 31 Mar 2023 register
    Capacity changed from 200 MW to 170 MW
  • 28 Feb 2023 register
    Added to the register

Also at Letchmore Heath 132kV Substation

Substation view

No other projects in the register at this connection point.

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