Progress at Sizewell C

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Since January 2024, when Sizewell C triggered its Development Consent Order — paving the way for formal construction of our nuclear power station on the Suffolk coast — we’ve been making rapid progress on-site.

  • >£2.5b
    Current contract value
  • ~300
    Active UK suppliers
  • £100m
    In local contracts
  • 70,000
    UK jobs supported

Civil Works Alliance at Sizewell C

Sizewell C is forming an alliance with three leading construction companies who will deliver the main civil works at the new power station in Suffolk.

A Programme Alliance Agreement has been signed between Sizewell C, Balfour Beatty, Laing O’Rourke and Bouygues Travaux Publics who together form the Civil Works Alliance.

 

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Rail progress

In April 2025, we marked a major step forward for the project with the arrival of our first bulk materials train via the branch line.

Carrying 960 tonnes of railway ballast – the first of a planned 10,000 tonnes – this delivery is a key part of preparing the site’s railhead. It also supports our commitment to transport 60% of materials by rail or sea, helping to ease pressure on local roads and reduce emissions.

Balfour Beatty Rail

In July 2025, The first straight plain line track panels – manufa