EXPELLED Tory rebels are plotting to oust Boris Johnson as an MP by running a candidate against him, The Sun can reveal.

Former Tory leadership rival Rory Stewart is being urged by some of the 21 rebels to stand against the PM in his Uxbridge and South Ruislip constituency.

3 Expelled Tories are plotting to oust Boris Johnson by running a Remainer candidate in his seat Credit: AP:Associated Press

The Prime Minister is defending a slimmed-down majority of just 5,034 in the Middlesex seat, leaving him already at risk.

A well-known Tory Remainer running against Mr Johnson could split the Conservative vote and hand Labour the seat, abruptly ending Boris’s premiership too.

The extraordinary plot would only be enacted if Mr Johnson still had a No Deal Brexit on the table going into the next General Election.

A Tory rebel source said: “There is an active discussion about running someone against Boris.

“It’s the nuclear option, but we would do it if we have to.”

TORIES TO RIVAL BORIS

Fellow Old Etonian Rory Stewart is a bitter critic of the PM’s and built a large public following for his repeated clashes with Boris during the summer leadership campaign.

Mr Stewart confirmed the suggestion has been put to him.

But he told The Sun tonight: “I would never run against Boris Johnson in his own constituency.

“I am hoping to bring the Conservative Party back to the centre ground. I remain loyal to it, I am not trying to destroy it”.

Ex-Cabinet minister Amber Rudd, who resigned the Tory whip in protest over Mr Johnson’s Brexit strategy this week, is also aware of the plot.

But she has also ruled out running against Boris in Uxbridge as the pair were long-standing friends.

3 Tory leadership candidate Rory Stewart has been touted as a potential candidate to run against BoJo Credit: AFP or licensors

The pro-Jeremy Corbyn Momentum pressure group have already unveiled plans to throw an avalanche of resources into Boris’s constituency in a bid to oust him.

If Boris Johnson fails to get re-elected as an MP, constitutionally he could continue as PM if he appointed himself as a Lord.

But he would face overwhelming pressure to stand down, as the last Prime Minister to lead a government from the Lords was the Marquess of Salisbury who retired in 1902.

Several of the suspended Tory rebels have told The Sun that their futures in the party now depend on whether the PM can do a deal with the EU by October 31.

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A large number of the group have already made it clear to Chief Whip Mark Spencer that they would vote for the deal in the Commons and be prepared to follow the Tory whip again.

The number include Ms Rudd, who said today she hopes to fight the next election as a Conservative, but will stand as an independent “with up to 20 people, depending on whether the whip has been returned”.

Ms Rudd also said her allies in the Cabinet should “speak out” if they are worried about what Mr Johnson is doing.

3 Brexit rebel MPs expelled from the Tory party: (from top left) Sam Gyimah, David Gauke, Alistair Burt, Philip Hammond, Guto Bebb, Steve Brine, Caroline Nokes; Justine Greening, Sir Nicholas Soames, Anne Milton, Rory Stewart, Ed Vaizey, Margot James, Stephen Hammond; Ken Clarke, Richard Harrington, Sir Oliver Letwin, Richard Benyon, Dominic Grieve, Antoinette Sandbach, Greg Clark

Boris Johnson insists he did not lie to the Queen about his reasons for suspending Parliament