Valid point Espada III so let me put some meat on my argument of closing borders until we can vaccinate.
We are where we are
We need to have borders closed in the UK when we reduce lockdown. Until then it may be prolonging the lockdown and increasing deaths, but after that it makes the difference between getting back to a degree of normality or getting a second wave
If closure is agreed policy, we need to tell all Britons abroad they have say 6 weeks to get home or then stay abroad for a protracted time. We need to ramp up repatriation flights but over the next 6 weeks. If the aviation industry works with the FCO it is doable
And then look after travel industries who will be in dire straights.