What to eat out on holiday?

Next week I'm going to England. I'll be shopping a lot and my fam. will want to eat out at the food court. What low-cal or healthy options can I get in Macdonalds,Burger King,Subway etc.. or what place can I drag them to that is a better alternativethan those kinds of food and has many chains so there would be one near me. Please don't suggest salads, they don't consider that as food.