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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 / North Scotland

Marram Wind Offshore Wind Farm

Marramwind Limited at Longside 400kV Substation

Connection date
31 Oct 2031
Gate
Not stated
Status
Scoping
Planning consent
Application submitted 19 Jan 2026
Marine Scotland · Source: REPD
Technology
Offshore wind
Total capacity
3,000 MW
Connected now
0 MW
Still to connect
3,000 MW
Transmission owner
SSEN Transmission (SHET)
Agreement type
Direct Connection
Region
North Scotland
Project number
PRO-001406
In the register since
January 2021 or earlier

Stages

StageConnected MWAdds MWCumulative MWDateGateStatus
101,0001,00031 Oct 2031Not statedScoping
202,0003,00031 Oct 2033Not statedScoping

Change history

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

  • 30 Jan 2026 register
    Connection point changed from OWF3 275/66kV Offshore Substation to Longside 400kV Substation
  • 19 Dec 2025 register
    Renamed from OWF3
  • 29 Aug 2025 register
    Customer changed from SCOTTISHPOWER RENEWABLES (UK) LIMITED to Marramwind Limited

Also at Longside 400kV Substation

Substation view

4 other projects, 5.5 GW 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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