UK Public Accounts Committee Assesses Financial Risks of Sizewell C Project

Recently, the UK Public Accounts Committee (PAC) published a report warning that the government's planned Sizewell C nuclear reactor project in Suffolk is a “bad deal” for taxpayers and consumers, with total construction costs potentially soaring to between £40.5 billion and £47.7 billion, exposing the public to extremely high risk of cost overruns.

It is understood that under the currently approved financing structure, the UK government holds a 44.9% stake, Électricité de France (EDF) holds 12.5%, and the remaining shares are held by private investors including Centrica (15%), La Caisse (20%) and Amber Infrastructure (7.6%). PAC Chair Sir Geoffrey Clifton-Brown pointed out that under this framework, private investors' exposure to additional cost overruns is capped at only £30 million, while the public could face billions of pounds in additional capital calls and high energy bills.

In response to criticism from the regulator, a UK government spokesperson said that the deal terms have established sufficient incentives to encourage investors to control costs and accelerate construction progress, and emphasized that the plant is expected to be completed and operational between 2039 and 2043, at which point it will save the UK energy system approximately £2 billion per year. Tom Greatrex, Chief Executive of the Nuclear Industry Association (NIA), also stated that the project will provide stable clean baseload power to the UK grid.

The PAC has required the government to submit a cost estimation analysis report within three months and to establish a semi-annual progress reporting mechanism. As a key nuclear power project following Hinkley Point C, the controversy surrounding Sizewell C's capital structure and risk-sharing mechanism will have a profound impact on the UK's future nuclear financing models and the commercial deployment of advanced nuclear power projects.