I think we'll do well to be very skeptical about the UK's claim to be carbon-neutral by 2050. The UK government is a bunch of failed children's party clowns that lurches from one self-created catastrophe to the next and blithely tears up international agreements at the drop of a hat. We need to be equally skeptical about the idea nuclear fusion will be a viable economic source of power anytime soon. Not only is there no feasible method for generating adequate outputs relative to total energy inputs, but the economics are very far from being realistic as well. My guess is that all the tokomak designs will prove to be dead-ends (as has been the case so far after more than 50 years of experimentation) but compression-based fusion will have some sort of future under limited conditions. Fusion is like maglev trains: lovely in theory, worthless in practice.