'People are assaulted by food at every turn, and we’re biologically programmed to eat in case there might be a famine round the corner,' explains Professor Susan Jebb as the West struggles with plenty. 

Professor Susan Jebb studies behavioural medicine at Oxford, and her work is becoming more important by the year as the West battles obesity, diabetes and a multitude of other weight-related illnesses. She focuses on why we eat too much, why fad diets are counterproductive, and how to get the public losing weight efficiently. Here, she talks through strategies to tackle our collective weight problem.