Bids presented in the UK SMR selection procedure.

Great British Nuclear (GBN) initially shortlisted six companies for the UK's new nuclear plans, with four—Holtec, Westinghouse, and two others—entering negotiations last September. In February, these four SMR vendors received an Invitation to Submit Final Tenders. GBN aims to select up to three technologies to support the deployment of multiple SMR units at a site. GBN owns land at Wylfa in Anglesey, North Wales, and at Oldbury in Gloucestershire, with potential for additional sites.

GE Hitachi is proposing its BWRX-300 boiling water reactor, Holtec’s SMR-300, a 300 MWe pressurized water reactor, Rolls-Royce's 470 MWe pressurized water reactor, and Westinghouse’s AP300, a 300 MWe/900 MWt pressurized water reactor. All vendors emphasize that their designs utilize existing technologies and can be built quickly with modular production techniques.

GE Hitachi's UK Country Leader, Andy Champ, noted that the government has a unique chance to lead in next-generation nuclear power, highlighting the BWRX-300's simplified, safe, and scalable design. Rolls-Royce SMR CEO Chris Cholerton expressed gratitude for his team's efforts and confidence in their competitive proposal to GBN.

In February, GBN stated it is on schedule to select the preferred technology by summer, with a final investment decision anticipated in 2029. GBN Chairman Simon Bowen mentioned that contracts may be placed with one to three technology providers for co-funding through design and regulatory processes, with each selected technology assigned to a site suitable for multiple SMRs.