@Remmy123
Kids were in schools for weeks over lockdown and no cases! I think it will all be fine and everyone will think it was a total over reaction
A maximum of 50% (primary - 3/7 priority years plus keyworkers) and 1/14th (secondary - 2/7 priority years in 1/4 at a time) were in at once.
Children were in small groups, with SD and very significant mitigation measures. Many primary children spent a large proportion of every day outside. Windows were open, because it was summer.
The rest of society was still very locked down e.g. children were not mixing inside in clubs, sports coaching etc.
Even so, there were outbreaks - look at the weekly PHE reports, where for some of the the weeks schools were open, outbreaks in schools / childcare outnumbered outbreaks in care homes.
The situation in September will be hugely different - all children in, no SD, no fixed groups, school transport packed as ever and mixing year groups, a choice between windows being open and a decent temperature. Significant mixing outside school.
'I think it will all be fine' is delusional.