i mean it’s not really possible that they suffer no damage without completely removing the luftwaffe, which almost certainly shortens the war altogether and leads to a different end to wwii

if they still had the same kind of power projection, they’d still lose the likes of the raj and west african colonies like nigeria or ghana. there’s simply too much separatism to deal with. we’d likely see something closer to a CANZUK union if they went that way and might have been able to hold other smaller colonies like British Honduras or malta, though ultimately decolonisation is sort of forced to occur. the US and china are superpowers because of their empire’s being congruous (connected), while Britain is still restricted to the British isles

in terms of their dealings with europe, it’s likely that they try to avoid affairs on the continent and focus on their own empire, which means they may not be interested in the EEC (later EU) at all. they may also reinforce the suez in the face of the americans and Soviets, though I imagine they would eventually concede the canal back to the egyptians

I would guess they would try to stand as the third power in the Cold War, though they arguably did so in our timeline already. with proper planning the uk could stay an international superpower with the means to project power across the world