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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 / South Scotland

Braxbess Branxton BESS

BRAXBESS LTD at Braxbess 400/132kV Collector Substation

Connection date
30 Apr 2028
Gate
Not stated
Status
Scoping
Planning consent
Granted 23 Jul 2025
Scottish Government (S36), reference ECU00004993 · Source: REPD
Technology
Storage
Total capacity
480 MW
Connected now
0 MW
Still to connect
480 MW
Transmission owner
SP Energy Networks (SPT)
Agreement type
Direct Connection
Region
South Scotland
Project number
PRO-002208
In the register since
January 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.

  • 29 Aug 2025 register
    Connection point changed from Branxton 400/132KV Substation to Braxbess 400/132kV Collector Substation
  • 28 Feb 2025 register
    Substation name updated in the register (from Branxton 400/132kV to Branxton 400/132KV Substation)
  • 27 Sep 2024 register
    Connection point changed from Branxton 400kV Substation to Branxton 400/132kV
  • 26 Apr 2024 register
    Renamed from Gresham House Branxton BESS
  • 30 May 2023 register
    Connection point changed from Bowsheil 132kV Substation to Branxton 400kV Substation
  • 28 Apr 2023 register
    Connection point changed from Branxton 400kV Substation to Bowsheil 132kV Substation
  • 28 Feb 2023 register
    Customer changed from Gresham House Asset Management Limited to BRAXBESS LTD
  • 31 Jan 2023 register
    Added to the register

Also at Braxbess 400/132kV Collector Substation

Substation view

1 other project, 650 MW 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

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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