Two days ago a TUI Fly Belgium B737-8 MAX operated the first commercial MAX flight in Europe since the grounding order was removed.
Today, TUI (UK) B737-8 MAX (G-TUMB) departed MAN for an hours flight up to 40,000ft over Southern Scotland before returning to MAN. This is the first time a MAX has flown in the UK since G-TUMF was brought back from TFS to BHX in September 2020 as far as I can tell. I'm assuming the plan is to have these flying this summer?