Ofgem Names Preferred Bidder for Dogger Bank B Offshore Transmission Assets

A consortium of Diamond Transmission UK (DTUK) and Japan’s Chubu Electric Power has been selected as the preferred bidder to acquire and operate the offshore transmission assets connecting the 1.2 GW Dogger Bank B wind farm to the UK grid.

The transmission system, valued at approximately GBP 1 billion (around EUR 1.2 billion) by the consortium, comprises subsea and onshore cables, an offshore converter station and an onshore converter station.

The consortium will operate the transmission business for 25 years after acquiring the assets and receiving an Offshore Transmission Owner (OFTO) licence from the UK energy regulator, Ofgem. The preferred bidder appointment is part of Ofgem’s Tender Round 11 process.

Ofgem launched the tender round in February 2024 and shortlisted four bidder groups in July that year. Ofgem appointed the consortium of DTUK and Chubu as the preferred bidder on 5 November 2026.

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