Mebyon Kernow
I recall back in the early '70's when I lived in Exeter, Devon there was consternation when pictures, purporting to be the Cornish nationalists (calling themselves "Mebyon Kernow" - "Free Cornwall"), training in paramilitary garb and rifles suddenly appeared. The security forces were quite concerned at the time - it was soon after the Provos started up in earnest. It transpired it was a rag week stunt by some students in Plymouth.
I was friendly with a chap in the Devon County Council planning department at the time and he told me that serious thought was being given to building a motorway so that the "emmits" (Cornish for tourist) and "grockles" (Devonese for emmits) could drive all the way to Lands End, see the sights there and then return home. The idea was that there would be no exits before Bristol!