ITV News Presenter Mark Austin reports
The former foreign secretary has apologised for the loss of life in Iraq but repeatedly refused to say sorry for the decision to go to war in Iraq.
Jack Straw, who served under Tony Blair, made the comments to ITV News' Mark Austin after the Chilcot Inquiry published its findings.
Mr Straw told ITV News: "I'm deeply sorry for the loss of life, but what I'm not going to do is to say I'm sorry about the decision I made at the time."
But he added: "I'm not going to back away from my judgement at the time on the best available evidence.
"If we had known then what we subsequently learned there would have been no possibility of British military action, it would have been both unlawful and impossible, but that's with the benefit of hindsight."