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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

Tollgate 49.5MW BESS

TOLLGATE ENERGY STORAGE LIMITED at Hatfield 33kV Substation

Connection date
Connected
Gate
Not stated
Status
Built
Planning consent
Granted 22 Jan 2019
Welwyn Hatfield, reference 6/2017/2340/FULL · Source: REPD
Technology
Storage
Total capacity
49.5 MW
Connected now
49.5 MW
Still to connect
0 MW
Transmission owner
National Grid Electricity Transmission (NGET)
Agreement type
Embedded
Region
England and Wales
Project number
PRO-002372
In the register since
September 2022

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.

  • 31 Oct 2025 register
    Capacity changed from 49.5 MW to 0 MW
  • 31 Oct 2025 register
    Connection date removed (was 31 Jan 2023)
  • 29 Jul 2025 register
    49.5 MW now connected
  • 29 Jul 2025 register
    Capacity changed from 49.5 MW to 99 MW
  • 30 May 2025 register
    Status changed from Consents Approved to Built
  • 23 Dec 2022 register
    Connection point changed from Elstree 132kV to Hatfield 33kV Substation
  • 28 Oct 2022 register
    Connection point changed from HATFIELD 33kV to Elstree 132kV
  • 30 Sep 2022 register
    Added to the register

Also at Hatfield 33kV 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

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.

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