Pinsent Masons advises on landmark Civil Works Alliance for Sizewell C

09 Jul 2025 | 08:21 am |

Multinational law firm Pinsent Masons has advised on the creation of a major delivery alliance for the Sizewell C nuclear power station in Suffolk, supporting the formation of a new alliance between Sizewell C and three leading construction firms.

The Programme Alliance Agreement has been signed by Sizewell C, Balfour Beatty, Laing O’Rourke, and Bouygues Travaux Publics, who together form the Civil Works Alliance (CWA).

Pinsent Masons provided comprehensive legal support on all aspects of establishing the CWA, which will be responsible for delivering key elements of the project, including:

• Enabling works and earthworks

• Marine and tunnelling works

• Main civil works, including the Nuclear Island, Conventional Island, Heat Sink, and Balance of Plant

• Ancillary works, such as permanent roads and networks

Sizewell C is expected to power around 6 million homes and play a central role in the UK’s net zero and energy security strategy. The CWA will generate thousands of jobs throughout the duration of the construction.

The Pinsent Masons team was led by partner Graham Alty and senior associate Sam Roberts and included a cross-disciplinary group of specialists spanning construction, disputes, cyber, IP, data protection, anti-corruption, insolvency, tax, employment, and insurance.

Graham Alty said, “We’re proud to have played a key role in bringing together this landmark alliance for Sizewell C. This Civil Works Alliance Agreement represents a major step forward for the UK’s nuclear ambitions and sets a strong foundation for delivering one of the country’s most significant clean energy projects and new build nuclear industry.”

Latest press releases

Show me all press releases

Pinsent Masons advises on landmark university merger

Multinational law firm Pinsent Masons has advised the University of Greenwich on the trailblazing merger with the University of Kent, paving the way for the creation of the UK’s first “super‑university”.

Pinsent Masons advises on sale of VLocker to Venu+

Multinational law firm Pinsent Masons has advised on the sale of VLocker, a global leader in the design, manufacture, installation and management of electronic locker systems, to Venu+, a United States‑based portfolio company of private equity fund ZCG.

Pinsent Masons launches in Poland

Multinational law firm Pinsent Masons is expanding its European footprint into Poland, announcing plans to open in Warsaw in mid-2026.

People who viewed this press release also viewed

Show me all press releases

Pinsent Masons advises ERG on acquisition of seven onshore wind farms from OnPath Energy

Multinational law firm Pinsent Masons has advised leading European renewable energy independent power producer ERG on its acquisition of a 100% stake in a portfolio of seven operational onshore wind farms in Northern England from OnPath Energy Midco Limited, a subsidiary of OnPath Energy.

Pinsent Masons MPillay advises Proparco on strategic Asia Pacific energy investment

Law firm Pinsent Masons MPIllay has advised French development finance institution Proparco (Société de Promotion et de Participation pour la Coopération Économique) on its investment in Singapore-headquartered energy-as-a-service (EaaS) infrastructure platform August Energy.

Pinsent Masons advises on acquisition of Alba Renewables

Multinational law firm Pinsent Masons has advised Southeast Asia-based clean energy developer Alba Renewables on its acquisition by a leading global investment firm.

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.