Ms Rudd said it was "right" for the government to make preparations for a no-deal Brexit, comparing it to wearing a seatbelt when driving a fast auto.
But Mann, who voted to leave the European Union in the referendum on 2016, said he did not believe there would be enough rebels to push through the PM's deal.
"The leaders are much more savvy than people think - they can see what is happening in the United Kingdom, and they were left unconvinced that it would be possible to get a trade deal done quickly because the British government remains opaque on what it wants".
The vote had been scheduled to take place in December but was called off at the last minute by the prime minister, who was facing nearly certain defeat.
"As politicians, we've got a responsibility to have a conversation with everybody that we now know that Brexit is going to be painful".
Mr Cable said this could be done by revoking Article 50, the mechanism which triggered the exit process, or by holding a second referendum.
"We will do everything we can to prevent a no deal exit".
"It will open the door to extremist populist political forces in this country of the kind we see in other countries in Europe", he added.
Trump Refutes Reports About Hiding Details of Talks With Putin
No evidence has publicly emerged that Trump was secretly in contact with or took direction from Russian officials, the Times said. The inquiry forced counterintelligence investigators to evaluate whether Trump was a potential threat to national security.
May warns MPs against 'breach of trust in our democracy'
He said the United Kingdom "must be willing to leave the European Union at the end of March on World Trade Organisation terms". But she stressed: "I intend to work with colleagues to make sure we avoid it". "I don't like the prospect of a no deal".
How Much Liverpool Will Miss Out On If Coutinho Leaves This Month
Should they win the Champions League and Coutinho be part of the squad, a further £4.4 million payment is due to the Anfield club. While Coutinho has undoubtedly failed to hit the heights of last season, he has endured his fair share of misfortune too.
"I would love a general election because that would allow us to give a very clear statement to the Tory government as to where we're standing", he said.
Elsewhere, it emerged that Speaker John Bercow met Tory remain rebel Dominic Grieve on Tuesday, the day before his controversial decision to allow MPs a vote on Mr Grieve's amendment to the timetable of the Brexit deal.
"If there is a general election, I would welcome that and I welcome the opportunity to campaign in the streets of Scotland if that is the case".
Brexit minister Stephen Barclay told BBC TV that persuading enough lawmakers to support the deal would be "challenging" but that even if it was rejected, he suspected parliament would ultimately support something "along the lines of this deal".
But officials said Brussels would be in listening mode, and take guidance from the prime minister as to the next steps should she suffer a heavy defeat as is widely expected.
He said there would be a "different tone" in British politics if Britain failed to leave the European Union and predicted a "less tolerant society" and a "more nationalistic nation".
Lawmakers in the United Kingdom are set to vote Tuesday on May's Brexit plan after she shelved plans for a December vote when it became clear she would lose that vote.
More than 100 Conservative MPs have already declared their intention to vote against May's deal.
Corbyn said that if he forced an election and his party won, Brexit may have to be delayed while a new government negotiated a revised deal with the EU.