A new publication out next month (Thames & Hudson) throws new light on Jeremy Deller's poignant public art project evoking the centenary last year of the bloody Battle of the Somme. The UK-wide event, entitled We’re here because we’re here, was commissioned by 14-18 Now, the official cultural programme for the centenary commemoration. Deller devised the piece in collaboration with 27 organisations including the National Theatre in London, the National Theatre of Scotland and Manchester Royal Exchange. The men, drawn from more than 1,500 volunteers, remained silent when approached, handing out cards with the names and ages of the battle casualties. At points, the participants sang the song We’re here because we’re here to the tune of Auld Lang Syne, a popular song in the trenches during the First World War. The new book shows how members of the public reacted to this stoic, sombre spectacle on the streets, and also includes an eye-opening interview between Deller and Channel 4 news anchor Jon Snow. Deller's notes and sketches also illuminate the creative process behind the wistful countrywide performance.