I think we may be headed back to aviation as it was prior to the seventies, with many less people flying. National carriers and those providing a public service like Loganair will have a place. Some business travel, visiting friends and relatives and foreign travel for the well off will be left. But I can't see stag nights in Prague or long haul package tourism coming back very quickly. In a realistic scenario we could see holiday flights starting up again in reasonable numbers in 2021, but this summer even if you have the money where will you be able to go?