Reporting from a couple days ago has somewhere over 60 with at least one dose and they're down to around 2500 new cases per day so I get people wondering about lockdowns (though I would thing 70% fully vaccinated would be a good target).
I suspect Boris fucked up by waiting too long to act so is now going to fuck up by keeping restrictions in place longer than needed.
But I haven't looked at much of their epidemiological data so they might still be in a place to justify action.