It's probably going to happen at the end of this week:
https://www.bbc.co.uk/news/education-51910835
"It comes after teaching unions spoke of the "intolerable pressure" of staying open as more and more staff get sick."
Strange that. I haven't heard of any other industries on the brink of shutting down due to sickness. I wonder if anyone's done the sums. See if I have it right. The current number of confirmed cases is a little under 2,000. The sawbones and scientists suggest the true number could be 35,000 (because many sufferers experience very mild symptoms and do not need testing or treatment). So let's assume they're right. That's (very roughly because all that's needed for these purposes) one person in every 2,000 in the country. There are (again very roughly) 500,000 teachers in the UK. That means, assuming teachers are succumbing at a similar rate to everybody else, there must be about 250 (0.05%) teachers affected. What sort of business is it that has to close down because of a sickness rate of 0.05%? Or is it that teachers are going down like flies (even though there seems no widespread infection among school pupils)? Or do teachers think we cannot do sums?