I think that there will be an easing for younger people quite soon- by that I mean June. I think that those over 70 and the vulnerable will be advised to self isolate for a long time - may be around a year with a few exemptions to visit family etc. That might help shops and pubs but the airline industry is in the most difficult position. It will require international agreement on the way forward and then people having the desire or funds to travel.
I really don't see any sort of demand for at least a year and any real recovery to something we recognise until 2023. Who will be left given that scenario is anybody's guess.