Boris Johnson has vowed that the UK will leave the EU on October 31 with or without a deal

Up to 30 Conservative peers are threatening to resign the whip if Boris Johnson attempts to force through a no-deal Brexit.

The remain-supporting peers are plotting to quit en masse amid mounting speculation that Johnson, who has vowed that the UK will leave the EU on October 31 with or without a deal, will become prime minister.

One prominent peer said that the discussions had accelerated in recent days after Johnson topped the ballot in the first round of voting in the Tory leadership race, with 114 votes.

“I am a Conservative, but I am not a no-deal Conservative and there is no way I will continue to take the Conservative whip if Johnson takes us over the cliff edge,” the peer said. “There are