A new nuclear power plant in Suffolk is under review and could be delayed or even axed, as the government tries to cut spending, the BBC has been told.
Sizewell C was expected to provide up to 7% of the UK’s total electricity needs, but critics have argued it will be expensive and take years to build.
A new high speed rail line in the north of England could also be axed.
“We are reviewing every major project – including Sizewell C,” a government official told the BBC.
The government is due to unveil its tax and spending plans under new Prime Minister Rishi Sunak at the Autumn Statement on 17 November.