 A contract is due to be signed by the end of March 2025. The first new reactor is expected to become operational for a trial by 2036, the second about two years later. Correspondent Jeremy Haas. Britain's new Treasury chief says she will run the economy with, quote, iron discipline. But Rachel Reeves also suggested yesterday that she'll give public sector workers an above-inflation pay raise to help end a wave of strikes and strife that have stricken the country.