Edit: yes, he said that. And more. Wow.
https://www.ft.com/content/38a81588-6508-11ea-b3f3-fe4680ea6...
'In another interview with the BBC, Sir Patrick said: “If you suppress something very, very hard, when you release those measures it bounces back and it bounces back at the wrong time.”
He added: “Our aim is to try to reduce the peak, broaden the peak, not suppress it completely; also, because the vast majority of people get a mild illness, to build up some kind of herd immunity so more people are immune to this disease and we reduce the transmission, at the same time we protect those who are most vulnerable to it.”'
Moreover they argue that demanding a long-term lock (14 weeks for schools, according to their modelling) is problematic if you go too early - they want to time it to be just before the peak. Basically is playing chicken with an unrushing truck, but a game of chicken with a purpose behind it.
The Chief Medical Officer Chris Whittey is an epidemiologist and I've only heard good things about him. I'm willing to take his advice. They government says it will be publishing the models.