Aviation was amongst the first industries to be affected by this virus, with closing of international borders. Unfortunately I feel it will also be the last to recover.
Even if we in the U.K. vaccinate quickly and successfully, I can’t see other countries opening up to us until their respective populations have achieved equal inoculation.
U.K. pubs will open, and domestic travel will probably boom this summer, but I just can’t see Spain etc being ready for a summer of (vaccinated) Brits!