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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

Mill Hill Tertiary Connection

HB333MIL LTD at Mill Hill 275kV Substation

Connection date
24 Oct 2025
Gate
Not stated
Status
Consents Approved
Technology
Storage
Total capacity
57 MW
Connected now
0 MW
Still to connect
57 MW
Transmission owner
National Grid Electricity Transmission (NGET)
Agreement type
Direct Connection
Region
England and Wales
Project number
PRO-000493
In the register since
September 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?

Change history

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

  • 30 May 2025 register
    Connection date moved from 30 Aug 2024 to 24 Oct 2025 (+14 months)
  • 30 May 2023 register
    Status changed from Awaiting Consents to Consents Approved
  • 28 Feb 2023 register
    Technology changed from Gas engines to Storage
  • 23 Dec 2022 register
    Substation name updated in the register (from Mill Hill 275kV to Mill Hill 275kV Substation)
  • 28 Sep 2021 register
    Added to the register

Also at Mill Hill 275kV 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