1066 is the most famous date in English history. On 14 October, on Senlac Hill near Hastings, a battle was fought that would change the face of England forever. Over the next twenty years, Norman culture was imposed on England, and English politics and society were radically reshaped. But how much is really known about William 'the Conqueror', the Norman duke who led his men to victory on that autumn Saturday in what was to be the last successful invasion of England? Mark Hagger here takes...