UK went to war before peaceful options exhausted and military action was "not last resort", Chilcot report says
Invasion in 2003 was based on “flawed intelligence and assessments” that went unchallenged
Threat posed by Iraq's weapons of mass destruction were "presented with certainty that was not justified"
Former PM Tony Blair says decision for action made "in good faith" and he takes "full responsibility for any mistakes"
Families of Britons killed during Iraq War say conflict was "a fiasco" and do not rule out legal action
PM David Cameron says "lessons must be learned" and announces two-day Commons debate next week
Labour leader Jeremy Corbyn says war was "act of military aggression launched on a false pretence"
Mark Thompson, whose son, Private Kevin Thompson, 21, from Lancaster, died in 2007 from injuries he suffered when his truck was attacked in Basra, said he felt "nervous" ahead of the report's publication.
Quote MessageWe've all been told nothing. It's nerve-racking for all the families. It is going to be very nervous because none of us know what to expect."
Karen Thornton's son, Gunner Lee Thornton, died in Iraq in 2006.
Read MorePeople should be held accountable for the Iraq War if the Chilcot reports finds evidence that can be acted upon, according to Alex Salmond.
Read MoreThe grandfather of a soldier from Leyland who was killed in the Iraq war fears they "won't find out the truth" and there will "probably be a cover-up" when the findings from an inquiry led by Sir John Chilcot is published later
Gunner Stephen Wright died serving in Iraq in 2006 when his vehicle was hit by a bomb.
His grandfather, Robert, said he is concerned families will not be given the answers they need.
"My own personal feelings are it'll probably be a cover-up, but we'll wait and see. It'll hopefully put everything to bed and people can get on with their lives."
Sarah O'Connor, whose brother, Sergeant Bob O'Connor, was killed when his Hercules plane was shot down in 2005, is among the family members who have filed into the Queen Elizabeth II Conference Centre in London this morning, to be appraised of Sir John Chilcot's historic report, hours before it is presented to the public.
Quote MessageThe length of time it has taken to get this has made a mockery of the inquiry system - for Iraq, for Rotherham... anybody who has found themselves on either side of the scales, this has taken too long. It's been a farce."
Welsh families who lost loved ones in the Iraq War hope publication of the Chilcot report, after a seven-year inquiry, will give them answers.
Jonathan Beale, BBC defence correspondent tweets:
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Image source, PAHere are some of the key issues likely to be addressed by Sir John Chilcot's wide-ranging inquiry into the Iraq war, set up to identify "lessons" to be learned from the conflict.
Those responsible for the Iraq war "need to pay the price", Angus Robertson has said.
On his way into the Cabinet Office to read the Chilcot report, the SNP's leader at Westminster added: "We have to understand how it was possible to go to war on the basis of a lie in the first place and then ask ourselves who was responsible and how do they face the responsibility."
Image source, Getty ImagesProtesters are outside the London home of former prime minister Tony Blair this morning.
Journalists are being given access to the full document this morning ahead of its publication.
They will be able to report what they've read once Sir John finishes delivering a statement – at around 11:00 BST - in which he will outline his main findings and the lessons learned.
Ahead of his report's publication, Sir John Chilcot has told the BBC it would criticise individuals and institutions.
He also said he hoped it would help answer some questions for the families of the 179 Britons who died between 2003 and 2009.
Welcome to our live coverage of the publication of Sir John Chilcot’s 12-volume report on the Iraq War. The full report will be released later – more than seven years after the inquiry began.