I don't think this really belongs above the line but, for what it's worth, the Office for National Statistics in the UK replaced "Social Class based on Occupation" (formerly the Registrar General's "Social Class) with a new Socio-Economic Classification (SEC) for all official statistics and surveys in 2001.

The new SEC is an occupationally based classification but contains "rules" to provide coverage for the whole adult population.

so R.I.P. "Social Class" - or maybe it's just a rose by any other name?