Hundreds of people are at risk of redundancy in Gloucestershire after Hitachi said it would suspend plans to build a nuclear power station in Wales.
The Japanese firm had also planned to develop land next to another site in Oldbury, but Hitachi said work would be suspended because of rising costs.
Horizon, the company owned by Hitachi and who are in charge of developing UK power stations, said they have been in close discussions with the UK Government and had made "strong progress" but have been "unable to reach an agreement".
380 people employed by Horizon in South Gloucestershire could lose their jobs.
Clearly this will have a significant impact for all involved with our project. We will look to minimise this as much as possible as we move into this next phase and we will begin consultation on the implications immediately with our staff who have shown extraordinary talent, resilience and determination to take this complex and exciting project to this stage.