I’ve mentioned this in another thread but thought it deserves one of its own.
So with the fiasco over testing and prioritising certain groups of which schools are not currently included it may force schools to close bubbles or whole school by default. If there are suspected cases but no option to test and carry on if negative then schools might have to treat this as positive test(s) as a precaution.
I can see that there could be many many schools closing over what would have turned out to be something else and not of concern.
Source within this article, which also quotes second national lockdown not ruled out.
www.dailymail.co.uk/news/article-8740183/Boris-FAILS-rule-second-lockdown-admits-testing-cope.html