When he was not selling new nightwear to the world’s rich and powerful, he was collecting their old nightwear at auction in London. Rose’s unrivalled collection, he said, boasted Queen Victoria’s evening gown, George VI’s pink silk pyjamas, Winston Churchill’s nightshirt, the white pyjamas for men worn by Princess Diana, President Kennedy’s night trousers and a cigarette-burnt claret and navy dressing gown from Edward VIII, the Duke of Windsor. Derek Peter Rose was born to Rosa (née Weissblatt) and Jack “Lou” Rosenberg in 1932 while they were on holiday in Margate. He was largely raised by his mother, an award-winning...