I’m not sure where you get your figures, but consumer inflation overall has remained lower in the UK vs US or EU since Brexit.
Yes, the overall inflation number tracks higher and lower in some months but food and fuel inflation is lower across the board, although the EU artificially reduced their numbers by keeping interest rates low, which looks great on paper but if you’re not adjusting to the market, you’re basically pumping the economy by printing money, eventually that will have to end.
Doesn’t help the Bank of England does everything in its power to create higher inflation (similar QE policies than the US) but most of the inflation according to Statista is in the area of taxes/duties (paying more for the state to do less, eg. NHS which has doubled its cost compared to its revenue in the last few years).