Source BBC. "A Department for Education spokeswoman said: "We have consistently followed Public Health England advice, which does not recommend the use of face coverings in schools because there are a range of protective measures in place, including children staying in consistent groups."
Our school have 300 per yr group. Students in our school will be in different ability classes for different subjects. Then mixing with the rest of the 1500 students in small corridors. Some gave siblings in multiple year groups.