Stansted and East Mids are back to being in the top 3 busiest UK airports during the week, (ABZ probably up there too, but Eurocontrol stats don't show heli flights) which is what was happening back in April and May. Cargo & mail are the only things keeping the aviation figures up.
I don't think anyone who worked through the dire situation back then expected to see the same again so soon. Which of course is compounded by the natural slow down for winter.