A Staffordshire MP is calling for tough action against Conservative MPs who don't back the government in any confidence motion on a no-deal Brexit.
MP for Lichfield Michael Fabricant has tweeted any Tory MP not backing the government should "lose the whip and be forbidden from standing as a Conservative".
Defence minister Tobias Ellwood told the BBC's Panorama programme that "a dozen or so" Conservative MPs would support a vote of no confidence in the government to stop a no-deal Brexit.
"I believe that absolutely is the case. I think a dozen or so members of parliament would be on our side, would be voting against supporting a no deal and that would include ministers as well as backbenchers," he said.
Next month about 160,000 Conservative Party members will choose the next leader of the Tory Party - and the next prime minister.
Members will receive their ballots between 6 and 8 July, with the new leader expected to be announced in the week beginning 22 July.