William Blake is now one of England’s best-loved poets and artists, associated with the well-known poem “The Tyger” and the hymn “Jerusalem”, regularly coined England’s unofficial national anthem. But in his time he was an eighteenth century radical visionary who challenged the social order as well as political and religious orthodoxy at every turn. He was even tried for sedition. Rajan Datar discusses his life, works and remarkable legacy with Blake experts Dr. Linda Freedman, Dr. Susan Matthews, Prof. Jason Whittaker and artist Michael Phillips. Photo: 'Newton' by William Blake (Bettmann Collection)