i totally get what you're saying, but...
... my point is that she's a bit thick, badly educated and socially not that competent. she's obviously been chosen for this reason, and for the fact that when it comes to etiquette and nicities (for instance, what to say and what not to say when you first meet someone new) she's not that slick.
some people who find social situations difficult and feel out of their depth resort to saying something outrageous in an attempt to break the ice, and i think that's what lesley did with saskia. it doesn't make it right or nice, but i suppose what i'm trying to say is give the girl a chance - comments about her being a 'typical back street lapdancer' etc just smack of intellectual snobbery. she's not posh, but she's hardly done anything to merit being branded with that one (not even that nurses outfit, which i've seen a million girls on hen nights wearing in public before).
having said this, i still don't particularly like lesley yet, she grates on me a bit, but i feel quite strongly about her being put down just because she's a council estate girl.
NB: re: the dance student thing - has noone been watching strictly dance fever, where glaswegian claire (who appears to be bigger than lesley) has got through to the final???? you don't have to be a twig to study dance, or to be a professional dancer. the roly-polys remark was just silly!!!