Arthur, King of Britons: From Celtic hero to cinema icon

King Arthur, probably the most popular of British kings and one whose name is synonymous with courage, chivalry and romanticism. Arthur, King of the Britons, Arthur the medieval legend, Arthur the Celtic warlord, Arthur of the Pre-Raphaelites and Arthur of the movies...would the real King Arthur please stand up? Daniel Mersey explores the many faces, myths and theories surrounding this famous king.