https://www.bbc.co.uk/news/articles/c624vezv52do
I think we have been here before with Jamie Oliver some time ago. Ideas like this in my opinion look great in paper and an easy win for government but implementation is a real challenge.
In a school I used to govern there were losses taken by catering companies in the school I offering healthy food with a lot of children avoiding healthy choices by taking in packed lunches or indeed not eating, overloading with carbs after school.
For a lot of deprived areas the aim maybe should be to ensure children get a t least fed without perhaps concentrating on food quality. I don't think you can necessarily change dietary culture easily or by essentially force. You don't want to inescapably antagonize parents and cause a meritocratic burden on teaching assistants if they have to for instance check packed lunches.
Good idea on paper but I am sure there are seasoned cynic a rolling their eyes a bit at this one.......