You're right I didn't notice that before
I recently spoke with a lady from Otley, Yorkshire, UK. She thought they sounded a bit like West Country (Cornwall).. so I did a little digging.. Here is a Cornish fisherman's accent
. See what you think? (voices start around 1:23)
(there seems to be some technical difficulties with new server on embedded youtubes. If embedded video says, no longer available
, try the hypertext link I gave above).