During his long life, the British Fascist leader Oswald Mosley knew just about everybody worth knowing. Politicians like Winston Churchill, Franklin D Roosevelt and Lloyd George. Leading society hostesses such as Lady Cunard, Mrs Randolph Hearst and Nancy Astor. He also knew Beaverbook, Northcliffe and Rothermere: the three most powerful press barons of their day. Authors like Compton Mackenzie and Henry Williamson were among his friends. And of...