The senior Guardian investigative journalist (winner of the Martha Gellhorn Prize and the Paul Foot Award for investigative journalism) has reported on six wars, from the 1991 Gulf War to Iraq and Afghanistan, but has also devoted much of his career to examining the relationship between the British government and torture. The results of this work were collated in his 2012 book Cruel Britannia: A Secret History of Torture. His most recent book, which he will discuss at Hinterland, is The History Thieves, an examination of the culture of secrecy and the destruction of official documents during the British colonial era. He talks to Myles Dungan.