Pity he didn't do Geordie, from around Newcastle. One of the most difficult accents to do if you don't come from there.
Scan though this; close similarities to the Scandinavian languages from the invaders who populated the North East coast of England and Scotland following the invasions in the 800's. There are parts of this in English with a Geordie accent, and bits poetry in true Geordie and Northumrbian.
There is also a sub-dialect called Pitmatic, which was spoken by coalminers. Almost died out now because of the decline in coalmining in the North East, but my grandfather, a lifelong coalminer spoke a lot of pitmatic, so my native dielect (when I turn it on, rather than Geordie with and English accent) tends towards pitmatic.