In recent years, there has been growing concern over the impact of poor diets and low levels of physical activity on the health and wellbeing of children and young people. Soaring rates of childhood obesity and a preference among children for static activities, such as watching television and playing computer games, have highlighted the necessity for promoting healthy and sustainable lifestyles. Unhealthy lifestyles in childhood can have serious and damaging effects on later outcomes, particularly for disadvantaged children and young...