I say old bean, I think we've seen this somewhere before!, but quite a long time ago, so perhaps worth a revisit.
I didn't vote in the poll. My parents were unequivocally old-school working class - factory/shop workers, left school at 14 with no qualifications, lived in a council flat, never had a car, no bank account, never travelled aboad, never ate in a restaurant, etc., etc.
My kids are uneqivocally middle class - university educated, take foreign travel for granted, assume home ownership as the norm, travel by car as the norm, have all the trappings.
But me and the missus (whose background was similar to mine) are somewhere in between. We grew up as working class kids but had the benefit of a grammar school and university (full grant, no fees) education, which undoubtedly made us "upwardly mobile" - and will live in a nice house in a nice area. Most people would consider me to be middle class, but I don't feel "part of the club". Many of our neighbours seem quite alien to me - middle/senior management (or self-employed) big cars with vanity plates, play golf, watch rugby union, vote Tory, several with kids at private schools, and so on. That's not me.
So I want a new category (and I have several friends around the country who whould fall into it): ex-working class, intellectual (it's not an insult), left-wing, public sector (education) employee - and probably a complete dinosaur!
Oh, and I fluctuate between "mom" and "mum", "dinner" and "lunch", "lunch" and "tea", etc.!