In Derbyshire we don't put butter on our bacon sandwiches, however I've noticed that you don't have to travel far south before they do. It fascinates me, where does this begin, and where else does this happen ?
i never did it with butter in birmingham till an irishman did me a bacon sandwich with marge, always had marge/butter since, now live in wales (south) and i believe most people do it with butter.