from Country life Nancy Mitford has a lot to answer for. It was she who, in 1955, set out in print what had never been written before – the unspoken rules for being ‘U’ or upper-class, and ‘non-U’. Her article, published in the CIA-funded magazine, Encounter, provoked an outcry, not least from her old friend Evelyn Waugh. In an open letter denouncing her for lobbing this grenade into British society, he wrote: ‘There are subjects too intimate for print. Surely class is one?’ Reading Mitford’s essay now, you realise how quickly everything changes. Back then, her observations on class were based on language – whether you ‘took a bath’ (non-U) or ‘had one’s bath’ (U). Whether you said ‘chimneypiece’ (U) or ‘mantelpiece’ (non-U). Today, having a bathtub at all is a sign of leisure, and therefore U (showers being much more common in every sense), while having a fireplace has become similarly recherché – and therefore U – in an age of remotely c...