If I might be cheeky and tell you your job
I would have thought you'd be dealing with matters related more to demographics than sociology/politics.
The question of takes no account of the fact that our somewhat quaint and pointless notion of class can be a transient matter. Take me for instance, My Father's parents were farm labourers, my mother's were a Royal Marine sergeant and a factory worker.
That might suggest I come from a working class background. However my father was an architect and my mother was a P.R/Marketing executive and they defined themselves as firmly in the middle.
I am a self employed professional with a public school / university education, and yet I have a part time job working on Tesco's nightshift to help makes ends meet, so where exactly
do I fit?
I appreciate statistics only work if people can be squeezed into one category or another, but essentially you've been stiffed with a "silly" question, since not only have I arguably moved up and down the social scale, but many of my friends have as well, by becoming better educated/getting better jobs or indeed by losing their jobs. I'm sure me and my friends are not unusual when compared against the population as a whole.