Dr Alison Tedstone is National Director with responsibility of diet, nutrition and obesity in the Health and Wellbeing Directorate of Public Health England (PHE). Her teams work areas include the National Diet and Nutrition Survey, nutrient composition of foods, scientific advice on nutrition (including the Scientific Advisory Committee on Nutrition), and messaging on nutrition and health issues. They also coordinate a cross PHE a programme of work aimed at tackling the nations obesity problem which supports national and local level delivery, including actions aimed at improving systems leadership and addressing the environmental causes obesity.