I only saw it one time waay late a night. On the Benny Hill Show he had a group of men; one from Australia, one form Scotland, one from Ireland, one that was a Cockney, one that spoke high classed English and a Welshman.
They are sitting in a small room trying to discuss something and the more they talk in their own dialect the less they understand each other. Quite funny.

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84 300D, 82 Volvo 244Gl Diesel