Ah did a little googling myself. No expert. But for anyone else wondering.
Both is the answer
The first positive consistent fusion was achieved in 2022. So over COVID. I may have missed it due to hiding ;)
But yes this is experimental. But fully expected to be the first full scale power plant. So Def worth the UK gaining the experience and solving the issues.
It is not expected till 2040. So 2.5b is way less over 15 years then it seemed.
Horse@lemmygrad.ml 1 day ago
don’t worry, it’s england, it will go 300% over budget, 5 years over the delivery date, then get cancelled
HumanPenguin@feddit.uk 1 day ago
Having looked it up and answered my own questions.
Yeah they are actually building a portable star.
And while it is very much an experiment. It is based on a smaller successful fusion plant from 2022.
So honestly using your guess. 7.5b 2045 and failing. Is still pretty fucking amazing amount the UK learns about a new future technology. And well worth the risk for the expertise we would gain.
If it actually works the UK will be helping the world make more. And the odds are pretty high compar d to the UKs first fission plants.