The School Food Trust has put forward proposals to ban schools from selling sweets, crisps and fizzy drinks in their canteens, tuck shops and vending machines.

The trust, set up by education secretary Ruth Kelly following TV chef’s Jamie Oliver’s programme on school dinners, has proposed that the ban should come into force in September this year.

The proposals, which are expected to be approved by the government, also include making sure that children have access to fresh, free chilled water at all times and that a variety of fresh fruit and vegetable is always be available.

Dame Suzi Leather, chairwoman of the trust, said: “New food standards from September will improve school meals, but they cannot succeed if pupils are surrounded with chocolate, crisps and drinks that fill them up with sugar and fat during the school day.”

“Anecdotal evidence suggests that when these products are removed, behaviour improves and this could also have implications for better learning,” she added.