What is the picture that flashes through your mind when someone talks of social classes? A reader of The Guardian newspaper once made an interesting albeit highly generalised observation. "Upper class: your name on the building. Middle class: your name on your desk. Working class: your name on your uniform." The reality is not so simple, of course, nor is it my intention to delve into a lengthy study of class divisions. Suffice it to say that we all have some idea of what constitutes the social hierarchies. Rich or poor, we all seem to know our place.