Hinkley Point C is scheduled for completion in 2029, with a contingency assuming completion in 2030. This assumes nothing else goes wrong!

See EDF Press Release: https://www.edf.fr/en/the-edf-group/dedicated-sections/journalists/all-press-releases/hinkley-point-c-update-1

When will the power station be finished? Resolves YES if both units of the power station are connected to the grid for commercial operation, and simultaneously generate rated power +-10% for a 1/2 hour period during that year (i.e. reduced power or testing does not count as YES, but finishing the bike shed is not required). Resolves NO 1st Jan after a year finishes, or if another year resolved YES.

I will add more years if Other >20% and reasoning in the comments.