Velux windows, Dave ? Wooden frames: more likely to be middle class; UPVC frames: definitely working class !

Any occupation: depends on the accent. Received Pronunciation: Decidedly middle class. Slightly detectable regional accent: Reasonably acceptably middle class, but of the lower echelons. Strong regional accent: working class (no matter what the income or profession).

"I look down on him, because he doesn't speak properly."
"Ee finks I oughta be lookin up to im cos ee speeks proper."

Eeh bah gum...

- jeanie (I do hope you realize this is tongue in cheek and plum in mouth !)