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UK Grants Final Investment Approval for £38 Billion Sizewell C Nuclear Plant

The financing plan makes the government the lead stakeholder in a project set to power six million homes by 2035.

Le gouvernement britannique a annoncé mardi 22 juillet 2025 sa « décision finale d’investissement » dans la future centrale nucléaire britannique de Sizewell C.
Londres: le gouvernement britannique annonce sa «décision finale d'investissement» dans la future centrale nucléaire de Sizewell C
Le site de Sizewell B en Angleterre, le 1er septembre 2022

Overview

  • The UK government formally approved its final investment decision on July 22, securing a £38 billion funding package for Sizewell C.
  • Under the agreement the government will hold a 44.9% stake alongside CDPQ (20%), Centrica (15%), Amber Infrastructure (7.6%) and EDF (12.5%).
  • Sizewell C will feature two next-generation EPR reactors designed to generate low-carbon power for six million homes with first output slated for 2035.
  • This marks the first occasion the UK government has taken an ownership share in a nuclear power station, signalling a strategic shift in its role in energy infrastructure.
  • While total costs rose from initial £20–30 billion estimates to £38 billion, per-reactor expenses are expected to be about 20% lower than at Hinkley Point C due to scale efficiencies.