Involvement with the WMD dossier
Kelly's specialism led to confusion about his actual job as he was frequently seconded to other departments. His job description included liaison with the media and he regularly acted as a confidential source, although rarely going on the record or appearing on-camera. In 2002, he was working for the Defence Intelligence Staff at the time of the compilation of a dossier by the Joint Intelligence Committee on the weapons of mass destruction possessed by Iraq. The government had commissioned the dossier as part of the preparation of what later became the 2003 invasion of Iraq.
Although not responsible for writing any part of the dossier, Kelly's experience of weapons inspections led to him being asked to proofread sections of the draft dossier on the history of inspections. Kelly was unhappy with some of the claims in the draft, particularly a claim, originating from August 2002, that Iraq was capable of firing battlefield biological and chemical weapons within 45 minutes of an order to use them. Kelly's colleagues queried the inclusion of the claim but their superiors were satisfied when they took it up with MI6 through the Joint Intelligence Committee.
Kelly believed Iraq had retained biological weapons after the end of inspections. He was privately supportive of moves to invade Iraq and remove the government of Saddam Hussein, and made the case to friends and family when they discussed it with him. After the end of the war, he was invited to join the inspection team trying to find any trace of weapons of mass destruction programmes, and was apparently enthusiastic about resuming his work there. He made one trip to Iraq from June 5–11 2003, but owing to a confusion over his visa, he was delayed for several days in Kuwait.
http://en.wikipedia.org/wiki/David_Kelly