The thing Ive never quite understood is that the UK has no domestic supply of uranium.

Canada, Australia and Germany are all big exporters; without tempting fate, I don't think the UK will have issues importing from those countries.

Almost all of Europe has stopped buying Russian gas? The exception being nuclear powered France. [1]

You also do know that we despite 19 sanctions packages still haven’t been able to sanction the Russian nuclear industry? We’re just too dependent on it.

[1]: https://www.highnorthnews.com/en/eu-talks-tough-russian-lng-...

The French gas plants have been built to support renewables, France didn't have almost any gas plants prior 2010.

There's no sanctions on the Russian nuclear industry because it's a rounding error financially compared to gas or petrol.