Before calling 'Chavs' uneducated and ignorant, you should pay more attention to your own grammar, spelling and punctuation. It has totally undermined your point.
As for white people thinking they're black, that's absurd and ignorant. ... and literally untrue.
I haven't read this whole thread so forgive me if i'm missing something obvious, but this is spot on. Chavs and Rich both have a horrendous grasp of the English language, as do Americans, Canadians, and Australians. Honestly the academics and foreigners are the only ones who understand the difference between "you're" and "your" any more.
Anyway, the OP is off point slightly as the "main two" are actually a "main 4" and they're Scottish, English, North Irish, and Welsh. Chav/nonchav is a secondary distinction within each of these categories. Find a posh Scot and a ned and see how they match to a chav and a posh English person; they don't.