Sale of transmission assets agreed at Galloper Wind Farm
25 Feb, 2020
  • Assets include offshore substation, onshore substation and subsea cables
  • Diamond Transmission Partners selected by Ofgem 

Galloper Wind Farm Ltd today announced it has signed an agreement for the sale of its transmission assets to Diamond Transmission Partners. The 353MW Galloper Wind Farm is owned by innogy SE, Siemens Financial Services, Sumitomo Corporation and ESB and a consortium managed by Green Investment Group and Macquarie Infrastructure and Real Assets. innogy led the project’s development and construction and operates it on behalf of the project partners.

The transmission assets included in the sale comprise the Galloper offshore substation, two subsea export cables, and the Galloper onshore substation.

The divestment takes place in accordance with the Offshore Transmission Owner (OFTO) regime. In November 2018, following a competitive tender, Ofgem selected Diamond Transmission Partners (DTP) as preferred bidder for the transmission license for Galloper Wind Farm.

Guy Middleton, Galloper General Manager said: “The offshore transmission regulatory regime is competitive and allows generators to be partnered with the most efficient companies in the market. I’m delighted to have concluded the deal with DTP, one of the market leaders in OFTO operations, and look forward to our positive relationship continuing into operations.”

Galloper Offshore Wind Farm is a 353MW project located 27km off the coast of Suffolk. The wind farm represents an investment of around £1.5 billion. It is estimated that the average annual generation expected at the site will be equivalent to the approximate domestic needs of more than 380,000 average UK households.1

For further information about the OFTO regime, see:


1 – Energy predicted to be generated is derived using wind speeds monitored in the local area and correlating to historical weather data providing longer term data. The calculations are based on an installed capacity of  353 MW.  The energy capture predicted and hence derived homes equivalent or emissions savings figures may change as operational data are gathered. Equivalent homes supplied is based on an annual electricity consumption per home of 4100 kWh. This figure is supported by recent domestic electricity consumption data available from The Digest of UK Energy Statistics and household figures from the UK National Statistics Authority.