The quality of the intelligence used to make the case for Britain going to war with Iraq has now been thrown into doubt, the Butler inquiry has said.
The 196 page report says MI6 did not check its sources well enough, and sometimes relied on third hand reports.
Lord Butler was asked by No 10 to look at the accuracy of Britain's pre-war intelligence after the failure to find weapons of mass destruction in Iraq.
He is now outlining his report, before Tony Blair faces MPs at 1330 BST.
The whole report is now available for download.