Not everyone has dinner with Winston Churchill and watches him re-enact the Battle of Jutland with wine glasses and decanters, puffing cigar smoke to represent the guns; or gets into a spitting match at a bus stop; or snorts cocaine with Lord Berners (the Uncle Merlin of Love in a Cold Climate); or is told by Diana Mosley how Hitler loved England and wept when Singapore fell to the Japanese; or hears from John Betjeman of his first teenage affair, in a punt with the son of a vicar; or can describe as Jim could a vast range of riveting and also somehow illuminating encounters with friends as varied as the Mitfords, Cyril Connolly, Mick Jagger, Cecil Beaton, Anthony Powell, Bruce Chatwin and Ivy Compton-Burnett – as well as the livelier end of the aristocracy and the other luminaries, sympathetic or strange, brought to light by the National Trust.