Sarah Hemming interviews director Rufus Norris about the process of putting on Death and the King's Horseman, by Wole Soyinka. Of the play: "Considered by many to be Wole Soyinka's greatest play, this 1975 drama is based on a real incident in Oyo, Nigeria, in 1946, when the colonial district officer intervened to prevent a local man committing ritual suicide. Soyinka's drama places that man, Elesin, at the centre of the story and follows the disastrous conseqeunces of his being unable to complete the rite."