Previous king: Henry VIII (father) Reigned: 1547-1553 Next queen: Mary I (sister)Edward VI was ten years old when he became king, and died when he was 15 years old. This meant that other people acted as regent, ruling England for him. His father Henry VIII had separated the Church of England from the Church on Rome. It was Edward who made the Church of England into a Protestant church. the Book of Common Prayer in English (rather than Latin) was introduced in 1549.