TORY MPs have expressed fears their party is being taken over by Ukip infiltrators who want to make Boris Johnson or Jacob Rees-Mogg the next Prime Minister.

Nigel Farage and Arron Banks’s right-wing pro-hard Brexit group Leave.EU has been encouraging supporters to join the Tories.

In a tweet, accompanied by a picture of Farage, they said: “If we want to get the Brexit we voted for, we need to take back control of the Tory party from the likes of [anti-Brexit MP] @Anna_Soubry. Nigel’s support for Tory-linked @LeaveMnsLeave shows he’s ready to back a pro-Brexit candidate for PM.”

In another, they said: “Fed up of how this weak ‘conservative’ government has handled Brexit?

“A leadership contest is inevitable. Join the huge number of our members already flooding the Tory party, ready to elect a true Brexiteer. Help put the spine back into the Tory party”.

Soubry said this was “blatant infiltration” of the Tories by “another political party to overthrow the PM and elect a Ukip-backed leader and force a no deal hard Brexit people did not vote for.”

East Renfrewshire Tory MP Paul Masterton agreed, he took to Twitter to say: “Farage and co are not Conservatives.

“They are certainly not Unionists. Mainstream Tory supporters must ensure they are members and ready to defeat this infiltration that might, if successful, deliver an ideologically pure (and economically damaging) Brexit, but will make us unelectable.”

Many Tories believe a leadership contest is coming sooner rather than later.

And the final say in who gets to be leader, in theory, goes to members who have been in the party for more than three months.

Meanwhile, over the weekend Boris Johnson, a favourite to win any contest, was trying to distance himself from his own Facebook page.

An investigation by the Sunday Times revealed it was hosting hundreds of Islamophobic messages.

Among the remarks on the former Foreign Secretary’s official Facebook page are calls for “no Muslims in government, police or army”.

One post read: “That’s crazy to trust them. They are just waiting for the Jihad signal to turn on us. #islamophobicandproud.”

Johnson is currently under investigation by the party for a column in The Telegraph two weeks ago where he described women who wear the burka as resembling “letterboxes” and “bank robbers”.

Tory Peer Baroness Warsi said his comments would make hate crime more likely.

A source close to Johnson said he “totally condemns the hateful views posted by a small minority on these Facebook pages”.

Meanwhile, multi-millionaire Julian Dunkerton has donated £1 million to the campaign for a People’s Vote on the final Brexit deal. He said the money would pay for “one of the most detailed polling exercises ever”.