Every country seems to have its versions of "heart attack on a plate" foods and Britain is no exception. One of these may be the chip butty. It's basically a sandwich of french fries, or chips, as we call them in the UK.
Two slices of white bread or a bap (like a hamburger bun) are lavishly spread with salted butter and then stuffed with chips. Some people like to douse all this with HP Sauce or cheese.
Chip butties are popular in the north of the UK and in Scotland. Not too surprising actually, since they also enjoy that other artery clogging treat, battered and deep-fried Mars Bars.