To reinforce cyclic and my post #13. At the moment the process for getting a U.K. licence alongside an existing EASA licence is simple but tedious and lengthy due workload at CAA. After end 2022 who knows? If you think you might want/need the U.K. licence my advice is to get on with it. It’s only 14 months away!
It probably wasn’t in the small print but has an E in it so that’s a clue!