Sir Michael Tippett's life has always been exceptional - expelled from prep school after prep school, from the age of seven he had to travel across war-torn Europe alone to stay with his nomadic parents in the school holidays. But he always knew that he wanted to be a composer as strongly as he knew he was homosexual. He was imprisoned during World War II as a conscientious objector when his friends - Britten, Sitwell, Eliot, Fry - all escaped prosecution,...