Dominic Grieve has revealed he would resign from the Conservative Party if it "becomes apparent" the government is pursuing a no-deal Brexit.
Appearing on the breakfast show, the former attorney general said it would be "impossible" to remain in the party if the "disastrous" decision is taken to leave the European Union on WTO terms.
"If it were to become apparent that the government is pursuing a no-deal Brexit and intends to take us out of the EU with no deal in the course of the next few weeks, then in those circumstances I couldn't remain taking the Conservative whip," he told talkRADIO's Daisy McAndrew.
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"If no deal isn't taken off the table and there is clear signs that the government intends to crash us out with no deal, I would not be able to remain in the party."
European Commission president Jean-Claude Juncker announced yesterday that he was "not optimistic" about no deal being avoided, following morning talks in Brussels with Theresa May.
'Prepared to take action'
Theresa May and Jean-Claude Juncker in Brussels. Image: Getty
However, Grieve, who has been a member of the Conservative Party for more than 45 years and an MP for 22, said there were politicians ready to "take action" to stop a no-deal Brexit.
"There are many MPs who think that a no-deal Brexit is a disaster and are prepared to take action to try to stop it," he said.
"We should be seeking an extension of Article 50 if there is no deal that has been approved by Parliament."