As a former resident of both the West Midlands and Somerset I certainly don't recognise any of the accents! Clarrie, at least, sounds like my Vale of Evesham family members. Though my mother used to tell me in her childhood you could tell which village someone was form from their accent, so there may be quite a bit of variability. And could someone please explain why Susan Carter and Tracy Horrobin, though sisters, don't share the same (or even a similar) regional accent? That is indeed a good question. Same could be asked about Will and Ed.
I'm not sure I buy the idea of Eddie being a petty criminal. He's cutting corners, expecting to people to pay good money for crap being passed off as something of value, but that's not so different from what we used to see on The Apprentice every week. I don't think Eddie would shoplift, sneak into people's back doors and lift handbags, etc