It is good that Tesco and Sainsbury's now have gluten-free areas—we have all seen them—but we need to look at the prices. I will compare some foodstuffs: if bread is normally 35p, the gluten-free price is £1.78; if plain white flour is 29p, the gluten-free price is £1.43; and if a packet of penne pasta is 37p, the gluten-free price is £1.48.As I listened to...