EDF and Centrica have proposed an £800 million investment to extend the life of the Sizewell B nuclear plant by two decades. Their offer hinges on the UK government guaranteeing a long-term price for the electricity it produces. This move aims to secure the plant's operation beyond its planned 2028 closure date.

The proposal arrives as the UK grapples with energy security and decarbonization goals. Sizewell B, a single pressurised water reactor, has been a stable power source since 1995. Extending its life offers a lower-carbon alternative to gas and provides grid stability, but requires significant capital for safety upgrades and refurbishment.

The government's decision will set a precedent for future nuclear life extensions and the broader energy market. Investors will watch for the agreed price mechanism, which could influence project economics. This deal underscores the critical role of existing nuclear assets in the UK's transition to a net-zero power system.