Tony Blair faces being thrown out of the Queen's Privy Council after senior British MPs from both sides of the Commons said they will use the damning Chilcot inquiry to try to rule him in contempt of Parliament.
A senior Tory behind the motion said the public now wanted to see the former Prime Minister punished for his role in taking Britain to war in Iraq.
David Davis, a senior Tory backbencher, said he expected widespread parliamentary support for a contempt motion as a way of holding Blair to account for "deceit".
Jeremy Corbyn, the Labour leader, said he was likely to back the motion because Parliament was denied information in the run-up to the 2003 invasion of Iraq to remove Saddam Hussein.
Sir John Chilcot last week delivered a damning verdict on Britain's Iraq intervention led by Blair, saying it was based on flawed intelligence, that Saddam did not pose an imminent threat, and that the campaign ended in failure.
Davis, the former shadow home secretary, said it could be debated before the end of the month.
Davis said: "The public want to see something done, there's no doubt about that. Well, this is a fairly symbolic punishment, but nevertheless it does at least give a verdict."
Davis said if the motion was passed, the Government would be forced to take notice. Corbyn said: "Parliament must hold to account, including Tony Blair, those who took us into this particular war."