Reaction to the Chilcot Report was swift and angry, with calls for legal and political action against Tony Blair.

Lindsey German, convenor of the Stop the War Coalition, said Sir John Chilcot's report underlined everything the group had been saying for more than a decade.

She told the Press Association: "We have been saying for years that Blair was disregarding the UN and was in this hideous relationship with George Bush.

"Chilcot should not be the end of the matter - it must be the beginning of legal and political action against Blair."

Among the servicemen and women who were killed in the conflict were men from the Bradford district. They were: Captain Philip Guy, 29, of Skipton, Royal Marines, March 2003; Sergeant Steven Roberts, 33, of Bradford, 2nd Royal Tank Regiment, March 2003; Lance Corporal Shaun Brierley, 28, of Batley, 212 Signal Squadron, 1 (UK) Armoured Division HQ and Signal Regiment, March 2003; Flight Lieutenant David Stead, 35, of Burley-in-Wharfedale, 47 Squadron RAF, January 2005; Sergeant Chris Hickey, 30, of Bradford, 1st Battalion, the Coldstream Guards, October 2005; Corporal Matthew Cornish, 29, of Pool-in-Wharfedale, 1st Battalion The Light Infantry, August 2006.

John Sauven, executive director of Greenpeace, said: "This report confirms what we already knew - that the Blair government led Britain into a disastrous war on a drumbeat of exaggerated threats, guesswork dressed as intelligence, and windy rhetoric.

"The formidable challenges humanity is facing today require international co-operation more than ever before. We cannot have a healthy environment without peace, and we cannot have peace without a healthy environment. This is why Greenpeace will keep campaigning for both."

Kate Hudson, general secretary of CND, said the report was a "damning indictment" of the conduct of Mr Blair.

She told the Press Association: "All the big questions about lies and the legality of war have now been answered. It is clear that Blair was a prime minister with very little concept of democracy and little respect for international law or the United Nations.

"He seems to have pursued his own path, with the United States, completely outside the normal legal or political process."

Mark Serwotka, leader of the Public and Commercial Services union, said: "We took absolutely no pleasure in being proved right about Iraq a decade ago and we take no pleasure in it now, but those responsible for what was a horrendous crime must be held to account.

"We were lied to, not only about weapons of mass destruction. We were also promised a swift resolution and a commitment to building a safe, secure nation, but instead we've seen a country ravaged by years of civil war, sectarian violence and terrorism."

The Liberal Democrats opposed the military intervention in 2003 under the leadership of Charles Kennedy.

Current leader Tim Farron said: "Blair was fixated in joining Bush in going to war in Iraq regardless of the evidence, the legality or the serious potential consequences."

He said Islamic State - also known as Daesh - had taken hold because of the absence of post-conflict planning.

Mr Farron said: "Charles Kennedy's judgment has been vindicated in every respect. I hope those in the Labour and Conservative parties who were so forceful in their criticism of him and the Liberal Democrats at the time are equally forceful in their acknowledgements today that he was right."

He added: "I hope Sir John Chilcot's findings can in some way provide comfort to the families of the British servicemen and servicewomen who lost their lives, and to the people of Iraq. Hundreds of thousands of Iraqis have lost their lives and a generation has been shaped by this illegal war.

"Far from being Bush's passenger, Blair was his co-pilot in taking this catastrophic decision which has destabilised Iraq, provided the hotbed for Daesh and tarnished Britain's reputation around the word."

Tory MP James Heappey, who served in the Army in Iraq, tweeted a photo of the inquiry with the caption: "So why was I really in Basra?"

Plaid Cymru MP Jonathan Edwards claimed Labour MPs' attempts to unseat anti-war leader Jeremy Corbyn are linked to the report, tweeting: "The reason for the Labour coup v Corbyn now clear #Chilcot".

Green MP Caroline Lucas said: "Chilcot's report is damning for Blair, his cabinet and all those MPs who voted to take this country into an illegal and immoral war in Iraq. Iraqis continue to pay the price for an invasion that took place long before other options for a peaceful resolution were explored.

"This report confirms the series of serious failures that led to this disastrous war. We know for sure that government ministers, including Tony Blair, lied to the public about their reasons for going to war. He said he would support George Bush 'whatever' eight months before the war - and thousands of lives were lost because he stuck to that promise despite the evidence in front of him."