The measures adopted in China were "Draconian" and obeyed.
Western society is less obedient and the state does not have absolute control and can only react to events in a way the public will mostly accept. We see the impact of that approach in the numbers infected in Europe. To suggest a death toll in the UK of 20000 when common flu kills 17000 each year is optimism on steroids I suspect. It is either a far less dangerous infection than they say or there is a cunning plan to stop infection outright somewhere down the tracks.
I do not believe either.
.A figure was quoted of 220k UK deaths several dats ago now 10% of that figure is quoted as an optimistic outcome. There has been no explanation for the revised anticipated mortality and does not correlate with 55 deaths equating to 55k infected in the community. Maybe an explanation will be forthcoming.