A chip buttie must contain:
Doorstop-thick white bread
Butter
Proper chips, cut from potatoes and deep fried, none of this frozen / oven chip nonsense
Salt
Sarson’s malt vinegar (remember the chip buttie vinegar mantra; if it’s clear, it goes nowhere near)
Heinz tomato ketchup
A correctly assembled chip buttie should be too tall to realistically fit in your mouth without compression and careful angling unless you’re Diana from V.
This is not a chip buttie:
Thin bread, watery ketchup, no vinegar, the butter seems to have all but disappeared and I suspect that it’s some form of “spread” instead. This image was lifted from a forum entitled “only in America” – I concur but I expect hat’s for wildly different reasons from the original thread’s intent.