Tony Blair could face a fresh investigation over the Iraq war with a group of MPs preparing to table a motion calling for a new inquiry.The former prime minister raised his political profile last week with a pledge to support the “politically homeless” who are unhappy with both the Labour Party under Jeremy Corbyn and Theresa May’s Brexit-backing administration.The Observer reported that MPs from six parties want a committee to examine the difference in Mr Blair’s evidence to the Chilcot Inquiry and the private assurances he gave to George W Bush in the run up to the Iraq conflict.MPs will debate the motion on Wednesday in a debate allotted to the SNP. It calls on MPs to recognise that the inquiry “provided substantial evidence of misleading information presented by the then prime minister and others on the development of the then government’s policy towards the invasion of Iraq, as shown most clearly in the contrast between private correspondence to the United States government and public statements to Parliament and people”.In addition, it has asked the Commons public administration and constitutional affairs committee to investigate what it describes as a difference between private and public policy.The motion’s sponsors include Alex Salmond, the SNP MP and former first minister of Scotland; Hywel Williams, Westminster leader of Plaid Cymru; and Green Party co-leader Caroline Lucas. Mr Salmond said the committee could even recommend that Mr Blair is stripped of his membership of the Privy Council.When he appeared before the Commons liaison committee, Sir John Chilcot said “I absolve him [Blair] from a personal and demonstrable decision to deceive parliament or the public – to state falsehoods, knowing them to be false.”A spokesman for the former prime minister declined to comment. Want the best of The Telegraph direct to your email and WhatsApp? Sign up to our free twice-daily Front Page newsletter and new audio briefings.