Duncan is a writer and director.
Plays include: People Places and Things (2015/16 – National Theatre/Wyndham’s Theatre); 1984, adapt. George Orwell (2013-16 – Headlong/Nottingham Playhouse/Almeida/West End and international tour, co-adapted with Rob Icke); Every Brilliant Thing (2013-16 -Paines Plough/Pentabus Theatre/Edinburgh Festival/UK and international tours); 2071, co-written with Chris Rapley (2014-15 – Royal Court Theatre/Hamburg Schauspielhaus); The Forbidden Zone (2014 – Salzburg Festival and Schaubühne, Berlin); Wunschloses Unglück, adapt. Peter Handke (2014 – Burgtheater Vienna);Reise Durch die Nacht, adapt. Friederike Mayröcker (2012/13 – SchauspielhausKöln, Festival d’Avignon, Teatertreffen); Lungs (2011/12-16 Roundabout season at Paines Plough and Sheffield Theatres/Studio Theatre, Washington DC, US) and Monster (2006 – Royal Exchange).
He was the recipient of two awards in the inaugural Bruntwood Playwriting Competition, 2006. Other Awards include the UK Theatre Best Director (with Robert Icke), 2014; Best New Play at the Off West End Awards 2013 and the Nestroypreis for Best German Language Production, 2013. He has twice been nominated for an Olivier Award in the Best New Play category. His work with director Katie Mitchell has been selected for Theatertreffen and the Avignon Festival, and continues to run in rep and tour the world.