Ha ha Raggytash! I expect there are adjacent towns/villages in Eire where the accent changes. My mother, born in Cork, had a lovely brogue, which stood out among our slightly Cockney-ish neighbours.
I well remember as a child seeing dreadful signs in the windows of houses with a room to let :- 'No Irish No Dogs No Blacks'
Maybe certain accents conjure up detrimental ideas about people's origins and cultures. But that in itself is interesting and sociologically worth studying.
(Well, I DID study Sociology (and Anthropology and Psychology) at University, among other subjects, for my Masters degree and Postgraduate Teaching Qualification)