They started doing them here in Gibraltar recently (so I assume they do it everywhere) as well as wraps and the normal sub sandwiches. They start at £3.99 for a basic pizza (quite a reasonably sized pizza, usually i am full before i even get to the last slice), each meat topping is 75p extra, any other topping is free. And of course you get all the sauces and stuff you usually do.
Me and my husband have always the same orders, which only changes if they have run out of an ingredient.
I have chicken tikka, chicken teriyaki, red onion, green pepper, tomato, oregnano and tomato ketchup. the ketchup is compulsory!
My husbands is tikka, teriyaki, bacon, pepperoni, red onion and bbq sauce. way too meaty for my liking but he loves it....