Sigh....it feels like this is a never ending circle right now, and the government hasn't still learned from the previous 3 lockdowns. If you allow people to travel abroad or mingle until the vast majority of the planet get's vacinated, it allows the virus the ability to mutate constantly in the populations of multiple nations, and the developed vaccines which scientists put so much work into made redundant. The obvious answer to this is:
1. Bar international travel. Full Stop. For 12 - 24 months
2. Assist airline industry that will inevitably be impacted by this (still better than bailing out the UK economy for 6 months at a time.
3. Once rates go down, open up, but only domestically and let life get back to normal until the world sorts itself out.
4. Co-ordinated global re-opening
This though will probably be waaaaayyyy to much to hope for
Unfortunately the UK through the previous 3 lockdown bailouts has put us on a pretty precarious position with regards to how much we can borrow in relation to our GDP (they blew it in the previous lockdowns), so BoJo appears to be going for herd immunity now....
God help us all. Stay safe everyone.