Actually, I think I would also love to know the proper British English word for the type of housing that's called 'projects' in US (slums?), but it's a secondary question after all =). The main question is: is there a specific term that could describe a typical resident of such housing? Somebody with low income, who often gets in trouble with law enforcement and probably wears sportswear on any occasion.
If that helps: I just watched the movie "Kingsman: The Secret Service" and would like to find a term that could properly describe a type of person the protagonist was before turning to the gentleman kind of guy. Something slang or pejorative would fit, as long as it hits the bull in the eye.