> For power production they have been much to expensive for decades.

Sizewell B signed a contract for difference at £70.50/MWh for the next 20 years, which is cheaper than UK offshore and onshore wind in CfD AR7.

https://www.gov.uk/government/news/sizewell-b-power-plant-gi... https://www.gov.uk/government/publications/contracts-for-dif...