I've been following 'Dr' John since the start and always found him to be informative and useful. In his latest video, he has changed his tone somewhat.
If he's right, and the consensus is now that herd immunity is impossible, because the vaccine can't prevent transmission, then that's obviously very significant in terms of what the policy will be from now on.
This presumably also assumes that it's not going to be possible to 'tweak' the vaccine such that it can prevent onwards transmission.
He doesn't really talk about what happens if we get to a point where the health service can't deal with hospitalisation numbers.
Bring on the boosters, please.