I think that is the potential problem. He is a discredited "medium".
People are not always rational in their response to these sort of diktats - there are idiots out there who are deliberately spitting on policemen.
BBC had a very clear graph yesterday showing the exponential spread that results from just one person infecting another. I think that the CMO showing these things himself and explaining the science might hit home.
One of my DDs has a FIL who thinks it is all rubbish, and is behaving accordingly. Anything that might make people like him listen is to be welcomed.
If the "medium" of BJ is not hitting the spot - which seems to be the case for many - then a serious scientist needs to front the campaign.
Well Labour’s “patriotism” didn’t last very long, did it? 🇬🇧