In the U.K. the ban on all non “essential” journeys is not quite accurate, you are allowed to go to work if you “need” to, initially the building industry did continue but then the lawyers stopped it for fear of being sued for illness, then the supply industries shut down also. This week there are quite a few companies gearing up a return, due to customer pressure needing goods. It’s the social distancing advice that is going to cause problems and the “furlough” -( time off work on 80% pay), many don’t want to return they are happy doing nothing on 80% pay.
In theory if social distancing can be maintained there is no reason why flying cannot resume along with outdoor sports like golf and cycling, wearing masks would reinforce this change, the problem in the UK is there are not enough masks for the hospitals, never mind the public