Dudgeon OFTO
OperationalOffshore GridGB402 MW132 kV89 km2017
Basic information
9 fieldsAlso Known As
Dudgeon OFTO · TC Dudgeon OFTO plc · Dudgeon Offshore Transmission Owner · Dudgeon Offshore Wind Farm
Status
operational
Capacity
402 MW
Project Company
Type
offshore grid
Transmission Model
Developer Build & Transfer
Expected Life
20 years
Website
Supply Chain (12)
Project Timeline (26)
2038Decommissioning StartStale
TC Dudgeon OFTO plc plans to begin decommissioning of the Dudgeon OFTO transmission assets at the end of its initial 20-year licence period in 2038, including removal of the offshore platform, subsea export cables, onshore transmission cables and associated equipment, for which it has recognised a dedicated decommissioning cost provision.
2026Major Maintenance
Dudgeon OFTO has scheduled the next major outage affecting both transmission circuits for 2026, planning a significant shutdown window to support maintenance and further testing activities on the network.
2026Inspection Survey
Dudgeon OFTO plans to carry out the next round of onshore export cable testing and any required interventions, including follow‑up work on the area around joint bay 13, alongside the major outages scheduled on both circuits in 2026.
May 2024Inspection Survey
During May 2024, Dudgeon OFTO undertook an onshore export cable inspection campaign after sheath testing had identified a potential issue around joint bay 13, taking a short planned outage on one circuit to investigate the onshore cable joint and auxiliary transformer and confirming that the condition was low risk with no immediate remedial actions required. Further testing and intervention related to this section of cable is planned to coincide with outages scheduled in 2026.
Apr 2023System Restoration
Following repair works, Dudgeon OFTO returned shunt reactor 2 to service in April 2023, after which it has been operating normally, with a strategy put in place to maximise the long‑term integrity of the asset.
2019Operations Other
In 2019, TC Dudgeon OFTO plc introduced an ISO 14001 environmental management system for the Dudgeon OFTO transmission asset, enabling structured monitoring of energy use, waste, and fluorinated gases such as SF6 during the operational phase.
Nov 2018Other Permit Awarded
Authority: Ofgem · Licence: Offshore electricity transmission licence for the Dudgeon OFTO assets
In November 2018 Ofgem granted TC Dudgeon OFTO plc an offshore electricity transmission licence for the Dudgeon Wind Farm transmission assets, allowing the company to own, operate and maintain the offshore substation, export cables and related onshore assets and to earn availability-based regulated revenue for a 20-year period until November 2038.
13 Nov 2018Financial Other
As part of funding the acquisition of the Dudgeon OFTO transmission assets, TC Dudgeon OFTO plc issued £273 million of 3.158% fixed-rate secured bonds due 12 November 2038. Interest on the bonds, which are listed on the Irish Stock Exchange, accrues from the issue date of 13 November 2018 and is payable semi-annually, forming the senior debt component of the project’s long-term capital structure alongside subordinated shareholder loans.
13 Nov 2018Revenue Secured
On 13 November 2018, Ofgem awarded TC Dudgeon OFTO plc an offshore electricity transmission licence, securing a regulated, availability-based revenue stream for operating the Dudgeon transmission assets for 20 years to November 2038. The licence gives the company the right to earn index‑linked income for transmitting power from the 402 MW Dudgeon Offshore Wind Farm via the offshore platform, subsea and onshore export cables, and the onshore substation at Necton, with the tender revenue stream based on Ofgem’s assessed transfer value of the assets.
7 Nov 2018Stake Transaction
Ofgem granted TC Dudgeon OFTO plc (a Transmission Capital Partners SPV comprising International Public Partnerships, Amber Infrastructure and Transmission Investment) a licence for the 402 MW Dudgeon offshore transmission assets on 7 November 2018. The transfer value was GBP 297.9 million. Assets transferred from Equinor / Masdar / China Resources under Ofgem's OFTO Tender Round 5.
Transmission Capital acquired from Equinor (100%)