One thing we used to really love mom to put in our lunches when I was growing up were deviled ham sandwiches. Deviled Ham was a type of meat paste that came in a can, but it was different from other canned meat pastes in that it came wrapped in white paper with a fancy red devil printed on the outsides. We loved it. It was a bit spicy and salty and we just thought of these sandwiches as being very tasty. I am not sure if there is anything here in the UK that is the equivalent of it. If there is I have not found it. I usually make my own and today I used some of the leftover ham from our Easter dinner to do just that. It is a very simple thing to make if you have a food processor. I am not sure you could get the ham fine enough otherwise although you could certainly try. I think you might could with a really sharp knife, but it would take some time, chopping and re-chopping it to get the right consistency....