@lemmein
The PM makes policy. The Government decides whether we go into lockdown or not, the scientists and doctors just advise. The PM runs the Press Conference and they can decide things such as which slides get shown.
Chris Whitty is very careful not to go in and openly contradict the PM if he can avoid it, but if he is asked questions by journalists, the answers he gives are truthful and good advice. To the extent that the papers are full of it the next day.
The senior doctors really try their best not to cause this sort of problem for the Government news.sky.com/story/covid-19-dont-socialise-unless-necessary-to-help-slow-omicron-variant-spread-says-uk-health-chief-12483022
If there was open disagreement, I'd worry it would push the Government into appointing less able and appropriate scientists who would just be mouthpieces for Government policy (Gupta and Heneghan for example).
So it is in the national interest for there to be careful diplomacy around the health messaging.
And yes, of course the initial lockdown was warranted. Though it could have been shorter, and an earlier lockdown might have got us a better outcome, with less time locked down and fewer adverse effects therefore.