From the Independent on the Butler report:
Lord Butler has received submissions from Jacques Baute, who led the IAEA mission on the ground in Baghdad, and the director of the agency's Iraq Nuclear Verification Office. Mr Baute examined a set of documents supplied by the American government which purported to prove the existence of an Iraq/Niger intelligence link. At the time it was reported that the documents, which originated from a third nation, were passed to Washington by London.
It took Mr Baute and his team just a few hours to conclude that the documents were crude forgeries. Asked about the matter, Colin Powell, the US Secretary of State, said they "came from other sources. It was provided in good faith to the inspectors."
A former diplomat, Joseph Wilson, visited Niger in 2002 on behalf of the CIA, and reported that there was no evidence that Saddam had sought to buy uranium from the country. George Tenet, the CIA director at the time, declared that the Niger claim was "not tenable". And in last week's damning senate report on pre-war intelligence, a memo by a senior CIA official was revealed which said: "We told Congress that the Brits have exaggerated this issue."
Mr Blair's Iraq dossier claimed Saddam "sought significant quantities of uranium from Africa, despite having no active, civil nuclear programme that could require it." But the IAEA points out that it would have been impossible for Iraq to acquire uranium from Niger without this being discovered. The country's entire output at the time came from two mines controlled by a French company, and its entire output was pre-sold to France, Japan and Spain.