Have you heard about the London mod coming out sometime next year? It's massive and looks awesome! Can't wait to try that!
I do have some UK themed stuff, I think it’s a teaser by the people making the London mod. What I have is some British people in the remains of a crashed airplane who will sell me UK themed items.
Edit, this one: https://www.nexusmods.com/fallout4/mods/62876