The building of the plant by French energy giant EDF in southeast England, capable of producing around 3.2 gigawatts of electricity or enough to power around 6 million homes, was approved in July 2022.

"The government, the Sizewell C Company and EDF, the project’s lead developer, are looking for companies with substantial experience in the delivery of major infrastructure projects," a statement from the Department for Energy Security and Net Zero said.

The British government announced last year that it would support Sizewell C with around 700 million pounds ($895 million) while taking a 50% stake during its development phase.

"The launch of the formal equity raise opens another exciting phase for the project, following a positive response from investors during market testing," said Sizewell C Company Joint Managing Director, Julia Pyke.