Though welcomed by chefs and campaigners, many schools say the government’s plan to remove ‘grab and go’ options from the menu is a step too far

It is lunchtime at Richard Challoner school, a Catholic comprehensive for boys in New Malden, south-west London. The familiar smell of school lunch is beginning to waft around the corridors.

In the canteen, there is a moment of calm as the kitchen team make final preparations before year 7 descend – a mass of chatting, laughing boys, with backpacks swinging and empty tummies grumbling.