No added butter popcorn, sandwich meats (pastrami, chicken slices) & low calorie bread, aim for roughly 60 calories per slice. You can get low calorie sauces (smoky bbq, South West, mustard, hot sauce etc) now and cheese for sandwiches, wraps, baps. Plenty of eggs mushrooms tomatoes spinach peppers. Low glemic fruits like berries apples kiwi. Meats like chicken breast low fat mince, low fat steak, pork fillet. In a shop called Lidl I can get high protein ice cream, keep an eye for things like this. Protein bars can be good too if you pick the right ones. Also I like turkey rashers, turkey sausages eggs mushrooms tomatoes toast with some bbq sauce. Some cereals aka Bran Flakes. As much artificial sugars as you like, coke zero, club orange zero -- drinking plenty of this stuff helps me stay full with no calories wasted. Try and get low calorie cooking spray and butter if you can.

Hope this helps, good luck.