I'm not so sure about that. 72% of adults in Wales, 66% of adults in England and 65% of adults in Scotland are already fully vaccinated on the latest numbers. That's a significant number which is obviously moving quickly upwards each week.
The real question is what to do with kids which would/ will have a big impact on travel during the summer holidays. Malta have said all those 12+ need to be fully vaccinated, but the UK only does 18+ as standard or 16+ for those who are vulnerable meaning there's an effective ban on almost all 12-17 year olds traveling there.
The thing is though, whether it hits travel or not, it's probably the most viable path to wider travel across Europe and beyond.