That old U and Non-U thing had my mother utterly convinced! These terms were initially intended by Nancy Mitford as a joke but many people took them seriously; society in the 1950s was still intensely class-conscious. I don't care whether my evening meal is my tea or my dinner, as long as it's edible. However, we were brought up having our high tea at around 5.30 when Dad got home from work.Nobody around us had dinner parties. Rather like the Americans, my Mum used to refer to 'going to the bathroom' which was indeed accurate even when we weren't having a bath. I don't think 'loo' was commonplace in the 1950s.