Looking at the numbers, the July 19 date is viable if the tone is correct. It isn't though. Javid the new Health minister is out there suggesting we treat Covid like influenza from now on. Two other ministers have said on the morning rounds the last couple of days that they won't be wearing masks beyond 19 July. Johnson gives lip service to it but Whitty and Vallance are striking a very different tone to him in this press conference.
Whenever they lift all restrictions, there's going to be some risk, they've obviously decided that this is the point at which the risk level is acceptable. It's still a gamble though. And while I think it's less of a gamble than some of the particularly stupid ones they've taken in the past, it's still a gamble, and with the track record this lot have, you just worry that the case numbers are going to go through the roof, the UK will host the birth of the latest Covid supervariant and another step back is coming a few months down the line. Hopefully not, but it seems a bit dumb not to keep stuff like mandatory face coverings on public transport for a bit longer just for the sake of being able to say "all restrictions lifted".