Sizewell C
Documents for the Sizewell C new nuclear power station.
Sizewell C is a nuclear power station to be built on the Suffolk coast. The government confirmed a final investment decision for the project on 22 July 2025. Once operational it is expected to generate 3.2 GW of electricity, providing power for the equivalent of 6 million of today’s homes.Â
The final investment decision follows the conclusion of government approvals processes, and negotiations with potential investors as part of the capital raise process started in September 2023.
Economic licence
As required by the Nuclear Energy (Financing) Act 2022, the operator of a nuclear project’s electricity generation licence must be modified by the Secretary of State to allow the project to benefit from nuclear RAB levies.  Â
The modified licence puts in place the terms for these levies to be collected, and a series of incentives and penalties to drive the efficient construction, commissioning and operation.
The government has previously consulted on the modifications to the economic licence, as well as the methodology for calculating key values within the licence.
Funded Decommissioning Programme (FDP)
Under the Energy Act 2008 operators of new nuclear power stations are required to have secure financing arrangements in place to meet the full costs of decommissioning and their full share of waste management and disposal costs. These arrangements are set out in a FDP.
Value for Money (VfM)
The project’s value for money at the point of Final Investment Decision.