Education minister Lord Nash tells Express, "Schools have common law powers to search pupils, with their consent, for items." There is nothing to prevent schools from having a policy of inspecting lunch boxes for food items that are prohibited under their school food policies.
"A member of staff may confiscate, keep or destroy such items found as a result of the search if it is reasonable to do so in the circumstances." The government's foray into lunch inspections began when Cherry Tree Primary School in Colchester banned a Peperami sausage snack and scotch eggs from a six-year-old girl's lunch. Manchester's Manley Park Primary School seized cereal bars from lunches, according to the Huffington Post.