i think that's a bit overcooked. No one wants to block peoples freedom, certainly in the UK. This isn't North Korea.
As
@Mikey10 stated, i think there's going to be some concern on the variants (and this happened because we had someone come to UK from SA in February knowing full well there was an SA variant about but we didn't have them redlisted. Foolish).
Quite frankly, couldn't give two bricks about open borders, the country needs to reopen and lockdown the borders, if that means no one can go abroad, who cares, at least get pubs, bars, stadiums full to the rafters again.
Edit: To add on Chile btw, the vaccine programme led to people completely dropping their guard and now the virus is spreading again, and hitting them again, and causing lockdowns again.
Unforutnately based on the sights of this week, where many young people who have not been vaccinated are out and mingling the same, i do worry the bounce will be bigger than anticipated.