You start with a vision, and you deliver a compromise. You want a play to be challenging, ambitious, nuanced and complicated. You also want it to sell tickets. You want to make art, and you know you’re in show-business. The inside story of 12 years at the helm of The National Theatre is a story of lunatic failures and spectacular successes. Its cast includes the likes of Alan Bennett, Maggie Smith, Mike Leigh, Daniel Day-Lewis, Michael Gambon, Helen Mirren and, of course, William Shakespeare.