MPs will hold a vote of confidence in the government on Monday amid renewed calls from the opposition for Boris Johnson to step down immediately and hand over to an interim prime minister.
If the government is defeated, it will almost certainly trigger a general election, although that would require a significant number of Tory MPs to vote against, or at least abstain.
However, that seems unlikely given the party is leaderless and in no condition to conduct an election, while the initial wave of anger against Mr Johnson has largely died down.
It could offer the Prime Minister one last chance to defend his record in front of MPs after the tumultuous events that led to his downfall, amid accusations of lying and breaking the rules.
Mr Johnson was expected to open the debate – although it is unclear whether he will do so now or leave it to another minister.
Exceptionally, the vote will take place on a government motion.
Labor initially said they would seek to hold a vote of no confidence after Mr Johnson announced he would remain Prime Minister until the autumn and a new Tory leader was in place.
However, the Government refused to accept the wording of the Labor motion, which expressed no confidence in the Government and the Prime Minister, effectively forcing Tory MPs to publicly state that they still had faith in Mr Johnson if he did. they wanted to avoid an election.
Instead, ministers tabled their own motion after Commons Deputy Speaker Nigel Evans told both sides to resolve the issue themselves.
Ahead of the vote, Liberal Democrat leader Sir Ed Davey, who tabled an amendment demanding Mr Johnson’s immediate resignation, said: ‘Tory MPs have an opportunity to show they listen to the people by getting rid of this Prime failing minister.
“Boris Johnson should go now and when a new Tory leader is in place we should have a general election so the people can kick these Tories out once and for all.”