Wolverhampton (yam-yam) is an excellent accent and quite unlike Birmingham in its expressiveness. And no I'm not from either but know a fine sound when I hear one.
Neil Tennant of Pet Shop Boys sings in a fascinating mix of posh geordie and faux Noel Coward. Then there's Morrissey's Betjeman/Bet Lynch hybrid.
One question I've often pondered is why all crusties, protesters, new-agers adopt a Swindon accent whatever their origins.