With the help of Sir Trevor McDonald and Julia Bradbury, Britain’s Greatest National Treasures counts down the illustrious top twenty and reveals the Greatest National Treasure of all time. After years of delivering the News at Ten, Sir Trevor McDonald gets up close to Big Ben for the first time in his career. Quizmistress and star of The Chase Jenny Ryan explains that it was the British Museum that drove her insatiable appetite for knowledge; Eamonn Holmes recalls childhood excursions to the Giant’s Causeway; and comedian Hugh Dennis reveals that his father was Prebendary of St Paul’s Cathedral.