Mark Francois has urged MPs to see Brexit through, claiming it should not fall to the Queen.
The Conservative politician said MPs were "honour bound" to the result of the 2016 referendum, and accused some of attempting to "prevent" the UK leaving the EU.
"The monarch is the ultimate constitutional backstop," Mr Francois told talkRADIO's Julia Hartley-Brewer. "We want to avoid a position were we ask Queen Elizabeth II to have to take an incredibly difficult decision."
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"The people took a decision and all MPs are honour bound to vote for it."
Mr Francois, who is the vice-chair of the European Research Group, said he predicted that the public would become increasingly angry if Brexit was stalled, or stopped altogether.
"You don't need a Masters degree in politics to see that already, some MPs are trying to undo the result of the referendum," he said.
"I don't think we're going to be seeing people in yellow jackets setting fire to Oxford Street, but I think it's more likely you'll get people inundating their MPs with emails and letters, saying 'up with this we will not put'".