PRIME MINISTER Theresa May faces fresh pressure after Foreign Secretary Boris Johnson’s warning of a Brexit “meltdown” was leaked, throwing an already chaotic Cabinet into further disarray.

Mr Johnson said at a private dinner on Wednesday night that there was a risk Brexit “will not be the one we want” and would keep Britain “locked in orbit” around the European Union.

At the gathering of the Conservative Way Forward, a Thatcherite campaign group, he branded the Treasury the “heart of Remain” and claimed negotiations were approaching a “moment of truth.”

Communist Party general secretary Rob Griffiths told the Morning Star that “the Tories are trying to hold their party together, while obeying big business demands to keep Britain tied to EU single market rules, Brexit or no Brexit.

“A double failure could open the way to a Labour government, free from EU rules to enact left and progressive policies.”

Downing Street has said Ms May still has full confidence in Mr Johnson, saying she thought that her ministers were “working hard to deliver on the will of the people.”

Scottish First Minister Nicola Sturgeon said it “speaks volumes” that Ms May “cannot get rid of” Mr Johnson or other Cabinet members causing difficulty because of “the weakness at the heart of her position.”

The Foreign Secretary’s deputy, Alan Duncan, raised eyebrows in Westminster when he floated the possibility of a referendum on the exit deal.

Ms May recently met with Brexit Secretary David Davis amid reports he was considering resigning unless she set a clear time limit on the temporary customs arrangement.

The Prime Minister has pleaded with Tory rebels to get behind the Brexit legislation.

Ms May could also face possible defeat in the Commons next week as the EU (Withdrawal) Bill returns with crunch votes on the customs union, single market and Parliament’s say on the final Brexit deal.