In the EU as a whole it's slightly higher because of the East countries (Hungary, Romania, Latvia, Estonia, ...) where inflation is crazy high because of their dependency on Russia for energy.

UK is in the very West of Europe, not East, and not reliant on Russia as East countries are. The economic impact of Brexit has just been significant, as it was supposed to be. Everybody knew it would be. Brexit was never about economy, but mainly sovereignty. That's a legitimate trade-off, of course, and many in the UK prefer to be a bit poorer in exchange for less dependency on their neighbours. I respect that. But it's important not to fool oneself thinking that leaving the highest economy in the world (EU economy was bigger than US' before UK left) was going to be good for the UK economy. That's just nonsense.