Theoretically if you would host your own Lemmy/PieFed server then you would be able to access everything (as long as you host it outside of the UK I guess). And then you could keep being moderator on those communities with your new account on your own instance.
That only helps you out though, if the communities were UK specific ones and other people from the UK meet to participate then there is no other way than moving them to a UK friendly instance.
Theoretically if you would host your own Lemmy/PieFed server then you would be able to access everything (as long as you host it outside of the UK I guess). And then you could keep being moderator on those communities with your new account on your own instance.
That only helps you out though, if the communities were UK specific ones and other people from the UK meet to participate then there is no other way than moving them to a UK friendly instance.