Interesting thread - I picked up a secondhand book a few years ago which covers similar ground: "Tykes, Dumplings and Scrumpy Jacks" by Bryan Waites (1993, Evergreen, Cheltenham; ISBN 0952241307).
It's a rather whimsical look at the history of various parts of the country and the supposed characteristics of their inhabitants - quite entertaining, though possibly veering towards stereotyping in places. I don't think we minded that kind of thing so much 20 years ago, and in any case, people have moved around a whole lot more since then, so finding a true native in some places can be quite a rarity.
Arthur