Joan Bakewell explores areas of belief with artists, thinkers and other public figures. She talks to historian, writer and broadcaster David Starkey about his Quaker upbringing, his rejection of religion as the answer to life's big questions and how he makes sense of recent moves in Catholic-Anglican relations. As the author of a recent biography of Henry VIII, he wonders if time is running out for Henry's great legacy - England's national church - the Church of England.