Cotto does indeed serve a variety of gluten-free Italian food. It seems on first glance like a friendly lively popular place. However, the food, especially the tomato sauce in many food items, all tastes rather sugary. And the gluten free food (bread, pizza, pastas) all taste even more sugary. Also, beware -- the bread they 'offer' you before you get your menu is NOT FREE. If you discover this too late, be prepared for unpleasantness. In most London restaurants, if you are offered bread before your menu, it means it's free. (In other London restaurants where they dont do this, you order bread from the menu just like any other starter). But in Cotto, they offer it, without stating that it's not free; nor do they point to the price which is noted in the menu. If you express surprise, they get very defensive, point to the price in the menu, and tell you that you're in the wrong. (Interestingly, on their bill, it also states that the olives are not free -- but now they mysteriously are). Cotto could be a gluten-free heaven. But it's not worth subjecting yourself to unpleasant tastes, unpleasant financial suprises, and unpleasant staff behaviour.