But, on a day when Theresa May suffered three Brexit defeats in the Commons - in which ministers agreed to publish the government's full legal advice on the deal - Mr Benyon justified his decision to rebel against his party in search of a "pragmatic" Brexit.
Veteran Tory Brexiteer Sir Desmond Swayne claimed "the game is up" for those who want to leave the European Union after MPs voted themselves the power to tell the government what to do next if the deal is defeated on Tuesday.
MPs have restarted their five-day long debate on Theresa May's Brexit deal in the House of Commons.
As the parliamentary debate plays out over the next few days, there are numerous scenarios being thrown up if the premier is unable to get support for her deal in the crucial December 11 vote.
He said that nobody wanted a no-deal Brexit but time had been wasted by the Prime Minister "going down a path that she must have known weeks ago couldn't command a majority in Parliament".
The caller then snapped at the host and questioned how he could respect people who voted Leave when they don't know what they voted for. However this is looking increasingly unlikely, with Labour, the SNP and other Tory Brexiters stating publicly that they will not back the December 11 deal.
"It is unthinkable that the Government tried to keep this information from Parliament - and indeed the public - before next week's vote".
Andrea Leadsom, leader of the Commons, said the government was "committed to leaving the European Union in line with the referendum" and warned the alternative risks Britain "leaving the European Union on March 29 next year without a deal".More news: Carbon Emissions Reportedly Will Hit All-Time High
More news: Ex-Seahawks player Brandon Browner sentenced to 8 years for attempted murder
More news: Mueller calls Michael Flynn's cooperation 'substantial,' recommends no jail time
Mr Whittaker (Calder Valley) said: "As the deal is only about the withdrawal and implementation period, I am quite pragmatic about the agreement".
Backers of another referendum say all of the deals on offer for leaving the European Union are very different from what voters were promised during the 2016 referendum and people should be asked if they still want to go ahead.
The party's Brexit spokesman Tom Brake said the public should have the "final say" on whether the United Kingdom left and he appealed to supportive Labour MPs to back his party's amendment.
The opposition Labour Party has said that it will immediately call a vote of no confidence in May's government if the Brexit deal is rejected.
DUP leader Nigel Dodds said his party would vote against the deal, but would not move to bring down May's government.
Last month the Prime Minister delivered a stark ultimatum to MPs - her deal, no deal or no Brexit. It is now for MPs to decide whether to back the deal, and, in the event that they don't, to propose an alternative route forward and thereby avoid no deal in March 2019.
Britain's pro-Brexit trade minister Liam Fox said it was now possible that Brexit would not happen. If so, all eyes on the size of the defeat: if the prime minister were to lose by more than 100 votes, her chances of survival would be remote.
Sir Graham told BBC2's Newsnight: "I think the most important thing is to have clarity about how we might remove ourselves from a backstop... if we were to enter into one in the future".
But some of her allies say she needs more time, with Brady telling Sky News: "I don't think there's any point in ploughing ahead and losing the vote heavily".