Sarah Gristwood is a biographer, journalist, and commentator on royal affairs. She wrote the bestselling Arbella: England's Lost Queen and Elizabeth and Leicester, and is the author of National Trust biographies of Beatrix Potter and Vita Sackville-West and Virginia Woolf. She is a Fellow of the Royal Society of Arts and an Honorary Patron of Historic Royal Palaces. Margaret Gaskin is a journalist, editor and historian. Previously Publications Editor for the Royal Shakespeare Company, she edited The 20th Century in Pictures and is the author of Blitz: The Story of 29th December 1940, which became the basis for the Channel 4/PBS documentary Blitz: London's Firestorm.