Sean Boyne and student Ibrahim al-Marashi have attacked Tony Blair for using their reports to call for war against Iraq.

Mr Boyne, who works for military magazine Jane's Intelligence Review. Articles he wrote in 1997 were plagiarized for a 19-page intelligence document to add weight to the PM's warmongering.

He said: "I don't like to think that anything I wrote has been used for an argument for war. I am concerned because I am against the war."

The other main source was a thesis by post-graduate student, Ibrahim al-Marashi's research partly based on documents seized in the 1991 Gulf War, including typing and grammatical errors.

After the dossier's origins were revealed, Mr Blair was accused. The fiasco has deeply damaged his attempts to win backing for military action.

And Labour MP Glenda Jackson said: "It is another example of how the Government is attempting to mislead the country and Parliament.

The PM's official spokesman rejected Ms Jackson's claims but admitted it had been a mistake not to acknowledge Mr al-Marashi's thesis in the dossier. He added: "The fact we used some of his work doesn't throw into question the accuracy of the document as a whole. This document is solid."

The dossier had been praised by US Secretary of State Colin Powell in his speech to the UN Security Council.