The Iraq Inquiry has delayed its report by at least six months as it argues with the British Government over the release of top-secret documents.
Sir John Chilcot and his panel, who began hearings two years ago, had been expected to publish their initial conclusions by the end of the year.
But in a statement yesterday, the inquiry team said its report would not be published until next summer at the earliest.
And it made clear that Chilcot was still being frustrated in his attempts to obtain classified Whitehall documents that could shed light on the build-up to the war.
Chilcot has repeatedly protested about the lack of co-operation from Whitehall over the release of paperwork, such as communications between then Prime Minister Tony Blair and President George W. Bush before the 2003 invasion.