At the same time, Etihad are resuming service to LHR, Ryanair are restoring some further destinations from STN and Wizz air are getting up to speed at LTN. Presumably carriers outside of the UK also have short-term plans I am not aware of. International coordination of actions, as proposed by EASA/Eurocontrol/everyone in their right mind? Never heard of it.
And then comes the issue how to refund those who booked their flight and couldn't make any use of it because of new restrictions out of the blue. Lots of extra pain in the back for everyone involved.