Work for theatre includes Debris, Osama the Hero, After the End, Love and Money, Taking Care of Baby, DNA, Orphans, The Gods Weep, and The Ritual Slaughter of Gorge Mastromas. He has written the book for the new musical of Pinocchio which opened at the National Theatre at the end of 2017, and in 2018 his new play Girls and Boys opened at the Royal Court. His plays have been performed worldwide and to date have been translated into nearly forty languages. For television he co-wrote and co-created Pulling and wrote and created Utopia. For film, he wrote the screenplay for Black Sea, directed by Kevin MacDonald. He also wrote the book for the Olivier and Tony winning Matilda the Musical. In 2010, DNA became a set text on the GCSE English Literature syllabus.