The problem with all these grand pronouncements that the UN was about to give Iraq a clean bill of health is that it is an allegation that is made up.
From Hans Blix’s book, “Disarming Iraq”
Ultimately, it’s clear from Blix’s statements that he had serious doubts about the intelligence, and Iraq was also unable to produce convincing evidence that there were no WMD. I believe Blix’s report would have said that there was neither the evidence to conclude that there were WMD, nor that there had been a disarmament. That likely would have meant that inspections would have had to continue until more evidence was gathered.
While I think that would have been a great idea, clearly Bush et al did not want to be locked into inspections with no completion in sight. Not because the UN was going to give Iraq a clean report card, but because inspections were limiting on their preconceived solution of taking Saddam out.