Their report isn't out till tomorrow, but continuing with the govt tradition of making big announcements via favoured news outlets, the Telegraph reports that the guidance will be that children aged 12+ will not be offered routine covid vaccinations.
"Instead, under guidance due to be issued on Monday, jabs will be offered to children between 12 and 15 who are deemed vulnerable to Covid or who live with adults who are immunosuppressed or otherwise vulnerable to the virus. They will also now be offered to all 17-year-olds within three months of their 18th birthday."
www.telegraph.co.uk/politics/2021/07/17/children-will-get-covid-vaccines-vulnerable/
So from September, there will be literally nothing stopping covid spreading around schools bar the odd open window.