As of now, we have to Stay Home. Unless you have to go to work or fetch medicine or go shopping you're in your house. Though we can go for exercise once a day.
This has seemed quite sudden but it has been brewing, what with the directions to avoid social contact, social distancing and the instructions on handwashing.
And of course, we've seen lockdown in other countries. The Italian situation has been especially scary.
But even as the restrictions start for the UK, there are worries that it has been left too late. That the talk of herd immunity, handwashing and social distancing wasn't enough. While the number of cases was rising, there were big events being held - such as the Cheltenham Race Festival.
There is no indication as to how long this will last - although it is notionally for a few weeks it could be months. Only at the end will we know how bad it has been. Will there have been 20 000 deaths - seen as a 'good result' or will it be much worse.