> "The old nuclear power plant at Wylfa was switched off in 2015"

Tangentially—this is a brownfield site, where there once was an early generation of nuclear fission reactor, cooled by CO2 gas. Here's a brief description of what those machines looked like (not this exact one):

https://news.ycombinator.com/item?id=29890470 ("Nothing like this will be built again"—263 comments)

Wylfa was Magnavox, not AGR. AGR was the next generation that never went full commercial.

Had a tour of the place back in the day before 9/11 and all that made the world a lot less fun.