Beatrice OFTO
Offshore GridOperationalGB588 MW220 kV181.5 km2018
Also known as:Beatrice Offshore Transmission Owner, Beatrice offshore transmission assets, Beatrice offshore transmission project, TC Beatrice OFTO Ltd, TR6 Beatrice OFTO
Status:Operational
Capacity:588 MW
Transmission Model:Developer Build & Transfer
Project Company:
TC Beatrice OFTO Limited
Type:offshore grid
Expected Life:23 years
Website:www.transmissioncapital.com
The Beatrice OFTO is the dedicated offshore transmission link that connects the 588 MW Beatrice Offshore Wind Farm (Outer Moray Firth, Scotland) to the GB onshore transmission network. The transmission system is an HVAC arrangement operating at 220 kV and comprises two offshore transformer modules (OTMs), two ~70 km 220...
Supply Chain (0)
Project Timeline (25)
Jul 2025Cable Repair
Following the April 2025 export‑cable fault, Transmission Capital Partners and asset operator SSE Renewables engaged NKT to execute a turnkey repair of the damaged 220 kV subsea export cable on the Beatrice offshore transmission system, using adaptive rigid sea joints deployed via NKT’s cable‑handling system aboard the vessel North Sea Giant and completing the offshore repair campaign in just 38 days.
Jul 2025System Restoration
After NKT completed the repair of the failed 220 kV export cable, the Beatrice offshore transmission system cable was re‑energised by the end of July 2025, fully restoring the export system’s capacity and allowing the 588 MW Beatrice offshore wind farm to return to full power output to the mainland grid.
Apr 2025Major Outage
In April 2025, an unplanned transmission outage occurred on one of the two 220 kV high‑voltage AC subsea export cables owned by Transmission Capital Partners for the Beatrice offshore transmission system, halving the site’s export capacity and reducing the amount of renewable electricity that could be delivered from the 588 MW Beatrice offshore wind farm to shore by about 50%, affecting supply to around 450,000 UK households.
23 Feb 2024Regulatory Other
Authority: Ofgem · Licence: Decision on Exceptional Event claim under Amended Standard Condition E12-J4 of TC Beatrice OFTO Limited’s offshore transmission licence
On 23 February 2024, Ofgem published a decision on TC Beatrice OFTO Limited’s Exceptional Event claim under Amended Standard Condition E12-J4 of its offshore transmission licence, determining that a failure on 17 and 19 January 2023 at the Beatrice offshore transmission system was not caused by an exceptional event, and therefore did not warrant exceptional-event treatment under the licence incentive framework.
17 Jan 2023Major Outage
On 17 and 19 January 2023, TC Beatrice OFTO Limited experienced a failure on the Beatrice offshore transmission system significant enough for the OFTO to submit an Exceptional Event claim under Amended Standard Condition E12-J4 of its offshore transmission licence; Ofgem later ruled that this failure did not qualify as an exceptional event, implying the associated outage or reduced availability would not receive special regulatory treatment.
24 Oct 2022Other Permit Submitted
Authority: Marine Scotland · Licence: Marine Licence Variation for Offshore Transmission Works (04461/00009451)
An application for a Marine Licence Variation for the Offshore Transmission Works of the Beatrice Offshore Wind Farm (reference 04461/00009451) was submitted to Marine Scotland, seeking to vary the existing marine licence governing the Beatrice OFTO transmission assets.
6 Oct 2022Other Permit Awarded
Authority: Marine Scotland · Licence: Marine Licence 04461/18/1 for Offshore Transmission Works
Marine Scotland granted Marine Licence 04461/18/1 for the Offshore Transmission Works associated with the Beatrice Offshore Wind Farm, with TC Beatrice OFTO Limited recorded as the licence holder and the licence commencing on 7 October 2022, authorising ongoing operation of the Beatrice OFTO transmission assets.
4 Aug 2021Stake Transaction
Beatrice Offshore Windfarm Limited, the generator joint venture for the 588 MW Beatrice offshore wind farm, transferred ownership of its offshore transmission assets, including two Offshore Transformer Modules, export cables and the onshore substation at Blackhillock, to TC Beatrice OFTO Ltd (the Transmission Capital Partners OFTO vehicle) for an asset transfer price of about £437.9 million under Ofgem’s Tender Round 6 regime, completing the divestment of the Beatrice OFTO.
TC Beatrice OFTO Limited acquired from Beatrice Offshore Windfarm Limited (100%)
27 Jul 2021Fid Financial Close
On 27 July 2021, the Transmission Capital Partners consortium (comprising International Public Partnerships, Amber Infrastructure Group and Transmission Investment) reached financial close for the long-term ownership and operation of the Beatrice offshore transmission link. The transaction financed the acquisition of the Beatrice OFTO assets, including the offshore transformer modules, export cables and onshore substation at Blackhillock, at an asset transfer value of GBP 437.9 million, with INPP investing about GBP 50 million in equity and subordinated debt in TC Beatrice OFTO Ltd and the remainder provided as long-term senior debt, underpinning a 23‑year, index‑linked, availability-based regulated revenue stream.
£437.9M
4 Sept 2020Regulatory Other
Authority: Ofgem · Licence: Final certification decision as unbundled transmission system operator for TC Beatrice OFTO Limited
On 4 September 2020, Ofgem (the Gas and Electricity Markets Authority) issued its final decision on TC Beatrice OFTO Limited’s compliance with Third Package unbundling requirements, certifying the company as sufficiently unbundled from generation and supply interests to act as the offshore transmission owner for the Beatrice offshore transmission project, with TC Beatrice OFTO Limited expected to become the licensed OFTO in January 2021.