Leader of the Liberal Democrats, Tim Farron, has said that he hopes the Chilcot Report will make it clear that intelligence chiefs warned that going to war in Iraq would stoke terrorism.
The MP for Westmorland and Lonsdale, added he hoped that the report would "provide closure for the families" of those who lost loved ones in the war.
Alex Salmond told Peston on Sunday that he was backing the motion because a "verdict" on Blair was needed.
The long-awaited publication of the Chilcot report has raised many questions - we take a look at some of the key issues.
Thursday morning's newspapers were no less critical of Tony Blair than Sir John Chilcot's report into the Iraq war itself.