Former prime ministers Boris Johnson and Liz Truss have said they are going to vote against Rishi Sunak's new Brexit deal for Northern Ireland.
Report informs via Sky News that the Windsor Framework was agreed by Mr Sunak and European Commission President Ursula von der Leyen on February 27 to change the way the Northern Ireland Protocol operates.
A crunch vote on the key part of the legislation will take place on Wednesday afternoon, when MPs will decide whether they want to back the Stormont brake or not.
Mr Johnson said the proposed new arrangements would mean the "whole of the UK" was unable "properly to diverge and take advantage of Brexit".
And Ms Truss is understood to believe the PM's pact does not "satisfactorily resolve the issues thrown up by" the protocol and "almost fatally impinges" on the UK's ability to diverge from EU rules and regulations.
A source close to her said: "After examining the detail of the Stormont brake and Windsor Framework, Liz has decided to vote against the statutory instrument this afternoon."