It won't happen.
The UK doesn't have enough spare water, energy or labour for any of this, and everything here is far too expensive. Labour aren't competent enough to be in power for more than one term, if they survive that, and any planning/deals with them will end when they go. Brexit Britain is not a wise choice to build stuff in. With the gaps on the supermarket shelves, failing services, absence of labour across multiple sectors, political instability and inflation, it is way too third world.
Nuclear power plants take too long and cost too much. The UK doesn't have spare ones like the US and Japan. If you really do want to build datacentres here, you could wait until Reform get in and abolish pretty much all regulation/green targets. But even then, the place will just go to hell faster, and it won't be somewhere you would be out of choice.
Companies may initially sign up though. British governments have a long history of handing over public money for political reasons and then walking away, getting nothing in return. Migrants to Rwanda etc. So some will have a go at bagging a sack of cash from a desperate, talentless political regime, with no strings attached, and then walking away with it.
Those meetings they wouldn't tell you about. How much were those individuals with vested interests paid simply to be there?