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 / South Scotland

Holmston Farm Battery Energy Storage System

Field Holmston Ltd at Ayr 275/33kV

Connection date
Connected
Gate
Gate 2
Status
Built
Planning consent
Granted 30 Jun 2023
South Ayrshire, reference 22/00505/PAN · Source: REPD
Technology
Storage
Total capacity
49.9 MW
Connected now
49.9 MW
Still to connect
0 MW
Transmission owner
SP Energy Networks (SPT)
Agreement type
Embedded
Region
South Scotland
Project number
PRO-002359
In the register since
March 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.

  • 30 Oct 2026 register
    49.9 MW now connected
  • 30 Oct 2026 register
    Status changed from Under Construction/Commissioning to Built
  • 18 Sep 2026 register
    Status changed from Scoping to Under Construction/Commissioning
  • 30 Jun 2026 register
    Connection date moved from 30 Jun 2025 to 31 Jul 2026 (+13 months)
  • 30 Jun 2026 register
    Given a Gate 2 connection offer
  • 29 Jul 2025 register
    Customer changed from Field Devco Ltd to Field Holmston Ltd
  • 27 Jun 2025 register
    Customer changed from Renewable Energy Systems Limited to Field Devco Ltd
  • 27 Sep 2024 register
    Substation name updated in the register (from Ayr 275/33 kV Substation to Ayr 275/33kV)
  • 31 Mar 2023 register
    Added to the register

Also at Ayr 275/33kV

Substation view

3 other projects, 550 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.

How QueueWatch matches projects · Spotted a wrong match? Email info@queuequant.com.