'U' and 'Non-U'
The expressions 'U' (Upper Class) and 'Non-U' (non-Upper Class)
came to prominence in Nancy Mitford's Noblesse Oblige (1956).
Today, some of her proscriptions seem bizarre (spectacles, not
glasses; looking glass, not mirror). Language is ever-evolving and
society is visibly relaxing - a preoccupation with the minute
calibrations of social class is looking increasingly
However, if you are anxious to pass muster in more class-aware environments you should remember the basics: loo or lavatory never toilet; sofa never settee; napkin never serviette; supper never tea; drawing room or sitting room, never lounge or front room.