Back on topic -
Grilled stilton & marmalade on toast (wait for it to cool down a little before eating!)
Tuna Mayo & melted cheese in a baguette
BM now you are back in the Uk have you tried the Pineapple in Dorney, they do about 40 different types of sarnie, choice of proper breads or baguettes which come with either soup or thick cut chips.
The Vampires Ruin (I think it's called) is lovely, hot roast beef, garlic, red onions & horseradish.