A repeated cross-sectional survey assessing changes in diet and nutrient quality of English primary school children's packed lunches between 2006 and 2016.

Objective: Mandatory school meal standards were introduced in 2006 in England; however, no legislation exists for packed lunches. This study analyses provision of foods and nutrients in packed lunches in 2016 to highlight differences in diet and nutrient quality since 2006.

Design: Two cross-sectional surveys of children's packed lunches were conducted in 2006 and 2016.