Project was given final go-ahead last year
The energy department has appointed Mott MacDonald to deliver technical advisory services for Sizewell C.
The £38bn plan to build a new nuclear facility on the Suffolk coast received its final investment decision from the government last July, with financial close following in November.
Once operational, the plant will provide 3.2 GW of energy, equivalent to around 7% of the UK’s total electricity needs.

It will use the same design as Hinkley Point C and is expected to be up and running by the mid-to-late 2030s.
Sizewell C is the first nuclear project to be financed using the regulated asset base model, which funds large public infrastructure projects by allowing investors to earn a guaranteed return on their investment over the life of the asset. The government retains a 44.9% stake in the scheme.
The Department for Energy Security and Net Zero’s (DESNZ) contract award will see Mott MacDonald provide advice and guidance to enable the government to fulfil its oversight roles as shareholder and policy sponsor of the project.
“This appointment builds on our long-standing relationship with DESNZ, where we’ve contributed to the delivery of critically important programmes addressing the challenges of the transition to a low-carbon economy,” said Claudio Tassistro, managing director of energy, UK and Europe at Mott MacDonald.
“Sizewell C stands as a key initiative for the UK, supporting both the achievement of net zero targets and the nation’s energy security. We’re proud to play a role in this significant project.”
The Civil Works Alliance, which includes Bouygues, Laing O’Rourke and Balfour Beatty is set to deliver the main civil works.
















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