A Trial to Improve the Healthiness of Packed Lunches in Primary School Aged Children

"The intervention consists of 7 separate components. The intervention components are to be delivered at three time-points (referred to as bundles). The bundles consist of:~Bundle 1a - Letter to parents of children bringing a packed lunch to school, 'spot the difference' lunch box tag (attached to all lunchboxes) and a Handy Swaps Card.~Bundle 1b - Letter to parents of children only having school meals and a Handy Swaps Card.~Bundle 2 - Lunch box mixer with ideas for creating nutritious packed lunches. Bundle 3 - Shopping list, packed lunch planner and reward chart to support planning and monitoring progress."