The government realise it can't be contained and there is no vaccine.
They've also calculated that there isn't a high enough death rate to do a lot.
So they want the population to build an immunity which means its a question of people getting the disease in an organised and orderly fashion.
This helps in the long term if this becomes a seasonal infection (which it's likely to) and would provide a degree of protection to more vulnerable groups through herd immunity.
It does however leave vulnerable groups utterly bewildered and anxious worrying about how they can avoid being part of the unlucky 1%.
Anyway I've been to the supermarket this morning and bought my milk and onion rings so everyone can go and panic buy this afternoon. There was plenty of stock of everything although there was low stock on some brands.
I was planning to go on holiday at whit so that looks screwed now if they are aiming for a May peak.
China will be pissed off though. They've done all the quarantining only for the UK to say, "stuff that". They've already report 7 imported cases from Italy.