David Hill is a retired aeronautical engineer, spending much of his career as an avionics/aircraft programme manager in the MoD. He managed over 130 programmes, including RAF Nimrod Electronic Intelligence during Gulf War 1, and the RN Sea King ASaC Mk7 programme. He provided evidence during the Nimrod XV230 and Hercules XV179 Inquests, the former leading directly to the restructuring of MoD's airworthiness system. He produced a report for the bereaved families of the 1994 Chinook crash. He is the author of 'Their Greatest Disgrace: The Campaign to clear the Chinook ZD576 Pilots'.