I agree with pp who say a new variant that is more infectious will logically infect more children.
School closures should be based on scientific evidence and studies. I would prefer my DS be in school instead of isolated at home on a laptop for 7 hours of school followed by 3-4 hours of homework/revision (sixth form). Who thinks 11 hours a day sitting on your own in your bedroom on a laptop studying is healthy and acceptable for a teenager? Not me, but we will do as told.
What annoys me is the other areas of the economy that will be kept open if schools close. I thought keeping pupils in school was this government's priority and other things would be closed in order for that to happen. In a low tier area such as mine, school closures would be taking place while pubs were still open! What kind of society has the UK become under this donor-driven government...