"This publication details the nutritional standards for school lunches, which all grant‑aided schools must adhere to. It has been produced under the School food: top marks programme... However, with this publication... the standards have been updated to take account of recent developments in nutrition and healthy eating in schools. This publication provides details on the nutritional standards for all food and drinks served at school lunches. It also explains the reasons why nutritional standards have been introduced and offers practical advice on how to implement the standards." - introduction.