Schools-uk-covid-your opinions?

I have gone back to school(uk) and my throat is hurting, there is 2000 kids, no masks, no social distancing and at lunch we are squashed shoulder to shoulder at these tiny tables. I have such a vulnerable mother and I am so anxious if I get it. I can’t wear masks at lunch and in classrooms so even though I wear one in a corridor...it’s pretty pointless-though I do it still. Curious to know anyone else’s thoughts on this x