No idea, but I managed to fly to Stansted yesterday on an Israir flight which was collecting Israelis to repatriate them. All cabin crew wearing full hazmat suits and masks. No more than 80 passengers with the first five rows and last four blocked off. I had a row to myself. No health checks carried out but we were required to wear masks the whole flight.
I have never seen airports so quiet. Tel Aviv was eerily empty, with two out of 80+ check in desks open. Four flights out yesterday. Arrival at Stansted was similar. Apparently only three flights yesterday. From walking into the terminal from the plane to walking out, including passport and collecting luggage was well under five minutes.