Sumption is erudite, persuasive and writes very well - I've read a number of his articles and heard him on the radio.
However, he's not an epidemiologist or any sort of scientist so I'm afraid for now I'm sticking with mainstream scientific opinion.
Some months back on the radio he talked about it's up to him if he wants to take the risk and attend a theatre, and I remember for a moment thinking, yes he's right we have to assess our own risks; but I soon came to my senses because if I pick up the virus at the theatre then come home on public transport, well that's how this will spread even further.
Today I read that many hospitals are at 90% already.