I think Boris should force all supermarkets to close with immediate effect, and only allowed to open for online shopping. This would give shops more of an opportunity to exhaust "manpower" on online rather than hurds of people charging in like its the start of the grand national. They'd also be able to use up other staff such as replenishers and cafe/checkout staff. I appreciate that not everyone knowledge to do an online shop (my parents refuse but they are in the vulnerable bracket). Nothing is stopping their children/in-laws/friends from doing an online shop for them to be delivered to their door.
He should also put everyone on lockdown (except key workers such as supermarket staff, NHS, police/army etc) - businesses pay 80% of wage - unless you're in a position to work from home.
I don't think people realise how serious this is, maybe they will when it's their relatives who become a statistic! Though I don't believe that all those who have died in the UK had ill health.