Pinsent Masons advises Diamond Transmission Partners Walney Extension Limited on £447m acquisition and financing of offshore transmission assets

11 Jun 2020 | 03:17 pm | 1 min. read

Multinational law firm Pinsent Masons has advised Diamond Transmission Partners Walney Extension Limited on the £447m acquisition and financing of the transmission assets relating to the 659MW Walney Extension offshore windfarm from Walney Extension Limited.

This regulated divestment of transmission assets, including the onshore substation, export cables and offshore substations, took place in accordance with tender round 5 of Ofgem's offshore transmission owner (OFTO) regime, whereby DTP Walney Extension was awarded an offshore transmission licence to own and operate the transmission assets following a competitive tender.

DTP Walney Extension is a partnership between Diamond Transmission Corporation Limited (a wholly owned subsidiary of Mitsubishi Corporation), HICL Infrastructure PLC, and Chubu Electric Power Company Netherlands B.V. (a wholly owned subsidiary of Chubu Electric Power Co., Inc.).

Walney Extension is a shared-ownership project between Ørsted (50%) and the project’s partners PFA and PKA (25% each).

The multidisciplinary London and Glasgow based Pinsent Masons team that advised DTP Walney Extension included Senior Associate David Ross and Solicitor Catherine Lusher advising on property aspects. Associate Philippa Godwin and Solicitor Imogen Dewar advising on planning and regulatory issues, Partner Murdo Maclean and Solicitor Beren Shorman advising on energy regulatory, projects and construction law matters and Partner Stephen Tobin, Senior Associate Michael Marston and Paralegal Tai Nguyen advising on financing matters. The acquisition team was led by Legal Director David Trethowan.  

Commenting on the deal David Trethowan said, "We are proud to have supported the Diamond Transmission consortium on another acquisition and financing of offshore transmission assets as part of the Ofgem competitive tender regime,  particularly given the current challenging circumstances.  The successful completion of this transaction is a further demonstration of the firm's market-leading expertise in the offshore wind and offshore transmission sector".

Latest press releases

Show me all press releases

Pinsent Masons announces FY26 results

Multinational law firm Pinsent Masons has today announced its unaudited financial results for the year ending 30 April 2026. The firm has generated a revenue increase of 3.3% to £703m. Profit per equity partner is £740k. 

Pinsent Masons advises MJM Group on another M&A transaction in the Polish insurance sector

Multinational law firm Pinsent Masons has advised MJM Group, one of the leading brokerage groups in the insurance and reinsurance market, on the acquisition of a 100% stake in Certo Broker and XILIUM. Certo Broker specialises in the distribution of group and health insurance products, while XILIUM provides a digital platform for the administration of group life insurance programmes and health insurance policies.

Pinsent Masons advises Nichols plc on Vit Hit acquisition

Multinational law firm Pinsent Masons has advised British multinational soft drinks company Nichols plc (Nichols) on its acquisition of Vit Hit Limited (VITHIT) for €75 million.

People who viewed this press release also viewed

Show me all press releases

Pinsent Masons announces FY26 results

Multinational law firm Pinsent Masons has today announced its unaudited financial results for the year ending 30 April 2026. The firm has generated a revenue increase of 3.3% to £703m. Profit per equity partner is £740k. 

Pinsent Masons advises MJM Group on another M&A transaction in the Polish insurance sector

Multinational law firm Pinsent Masons has advised MJM Group, one of the leading brokerage groups in the insurance and reinsurance market, on the acquisition of a 100% stake in Certo Broker and XILIUM. Certo Broker specialises in the distribution of group and health insurance products, while XILIUM provides a digital platform for the administration of group life insurance programmes and health insurance policies.

Pinsent Masons advises EDF power solutions and ESB on strategic partnership with Sumitomo Corporation in Gwynt Glas Offshore Wind Farm

Multinational law firm Pinsent Masons has advised EDF power solutions and ESB on the sale of a one-third interest in the Gwynt Glas Offshore Wind Farm to Sumitomo Corporation, marking an important milestone in the development of one of the UK's most significant floating offshore wind projects.

For all media enquiries, including arranging an interview with one of our spokespeople, please contact the press office on

+44 (0)20 7418 8199 or 

Location contacts

We are processing your request. \n Thank you for your patience. An error occurred. This could be due to inactivity on the page - please try again.