I am in Helsinki, so maybe a week ahead of the UK with the change thanks to our mate Covid. We went from schools still open announcement on Sunday, to schools closing announcement on Monday, to mandatory home schooling except for special cases today.
My take is that everyone who can should do as much as possible to isolate already. Any contribution to slowing the rate of transmission is a positive step.
Governments obviously have to take it slowly if they can to avoid panic and give ministries, organizations and companies time to prepare (though TBH I'm very surprised the UK has pubs open with vague guidelines still).
In terms of completing the season or when the lockdown is over...
...well, the UK isn't even close to lockdown yet. I'm presuming, given the UK's population density, it's going to get like e.g. France is now in about two weeks time (based on how quickly/slowly the govt are making decisions). And looking at how long Wuhan has taken to level off - in a totalitarian state, in extreme conditions - then 10-14 weeks of lockdown would be best case, maybe longer. Of course, all depends on how the health services can cope.
When we look at France, Spain, Italy, it's obvious that the lockdown is coming to the UK. Here in Helsinki the school holidays start right at the beginning of June, so I am already certain that the kids won't go back to school until earliest August. In the UK, kids back at school in July would be a miracle... and so my back-of-a-matchbox sums and my honest guess says that this social isolation - including e.g. grassroots football - will go on until well into the summer.
I hope things change for the better - and it's with a heavy heart - but I am preparing mentally for best case two months of home schooling, a very weird summer, and not blowing a whistle until something like August.
And then, back stronger!