A vote of no confidence in the government aimed at replacing Boris Johnson as prime minister may take place next week, a senior SNP MP said.
Stuart Hossey told the BBC that this move may be the only way to avoid a futile Brexit on 31
SNP leader Nicola Sturgeon hinted on Friday that he could support Jeremy Corbin to become prime minister.
However, the Liberal Democrats stated that the Labor leader was too much a divisor figure to play such a role.
Mr Johnson arrived in Manchester before the opening of the Conservative Party Conference on Sunday.
He is expected to tell delegates that only the Tory government will emerge from the EU referendum in 2016.
Deputies have refused to support the prime minister's request for early elections until the deal is canceled  Copyright
House of Commons
Mr Hosey said there was growing concern that Mr Johnson might find a way to circumvent the so-called "Bill Bill", which required him to seek an extension until the departure date of the United Kingdom, unless agreed deal.
The purpose of a no-confidence motion will be to install a temporary Prime Minister to ensure a brief delay of Brexit and then call a general election.
"We have to do it because there is no longer any certainty that the prime minister will obey the law and will ask for the extension, which Parliament only voted in a few weeks ago," he told the Today program.
"If we are serious about enlargement, which is the only game in the city."
Labor leader Mr. Corbin said on Saturday that recent talks with opposition parties were "productive" and the prospect of an urgent government was emerging. " more likely every day. "
Asked if he was ready to be the interim prime minister he replied: "Absolutely "The normal process is that when the government collapses, the opposition leader is invited to form a minority government in order to carry out a specific and strictly restricted process that would ensure that there is no collapse and prepare for a general election."
In a separate interview with BBC Radio Scotland, Mr Hosie suggested Voting can take place as early as Monday or Tuesday.
Mr Hoshi, a former SNP deputy leader, acknowledged that such a plan would require the consent of the opposition parties and the Tory rebels to succeed.
Liberal Democrat leader Joe Swinson said an "urgent government" may be required, but stated that MPs from all parties would not be able to rally around Mr Corbin as interim leader.
She stated that her party offered her other deputies as options, including senior deputies, who plan to withdraw in the next election.
Mr. Hossey says: "If another name that is acceptable to all, a figure like Ken Clark or Dominic Greve, comes up, then in itself it is obvious
" But it is also obvious that the second the (Labor) largest party should have the first chance to create this administration.
"If Joe Swinson and the Lib Dems are actually serious about stopping them in Brexit, then they have to stop playing political games, fighting with everyone else. "
A motion of no confidence in parliament allows MPs to vote on whether they want the government to agree
If the government loses the vote, MPs have 14 days to express their support for an alternative government.
If an alternative government cannot command a majority in the House of Commons at this time, a general election may be held
Mr Hossey stressed that it was vital for opposition parties to have a plan to secure a Brexit extension before Yes
"If this is not available and effectively agreed upon in advance, then we can go to the general election under Boris Johnson's terms and allow him to get out on the clock and break without a deal. "