Tripe is just about the *most* cooked thing it is possible to buy at a butchers......My dad doesn't eat it in sandwiches, as such, but does accompany a nice plate of honeycomb tripe with slices of bread and butter...
My first Saturday job was working at a kennels where they bread Boxers. Sloppy dogs. However, the amount of tripe which was boiled for the mutts put me off tripe for life.
Oh, it's lovely. I used to have tripe and onions in a white sauce with mashed potatoes every Saturday when I was a lass! Never tried it cold in sandwiches, though. It used to be eaten cold with vinegar I seem to remember.
My late mum used to love tripe.I remember her boiling it in milk and stinking the house out. One of my earliest memories.
My FIL's late mum used to phone him on a Sunday to say she had cooked tripe, he'd be down there in a flash. Have you ever seen a 60 year-old man run downhill?!