U and Non-U
She wrote an essay in Noblesse Oblige (1956), which helped to popularise the "U", or upper-class, and "non-U" classification of linguistic usage and behaviour (see U and non-U English) — although this is something she saw as a tease and she certainly never took seriously. However, the media have frequently portrayed her as the snobbish inventor and main preserver of this usage. She is credited as editor of the book but in fact the project was organised by the publishers. One of her novels, The Pursuit of Love, had been used by Professor Alan Ross, the actual inventor of the phrase, as an example of upper-class linguistic usage.