Jeremy Corbyn has called on key opposition party leaders and key Tory rebels to make him caretaker Prime Minister in order to stop Boris Johnson delivering a no-deal Brexit.
In a letter outlining his plans, Mr Corbyn said his government would be "strictly time-limited" until a general election is called and he would also seek an extension to the withdrawal deadline.
The Prime Minister has pledged to take Britain out of the EU on October 31 “do or die” and warned this week that the chances of a no deal exit were becoming increasingly likely.
The Labour leader wrote: "This government has no mandate for no deal, and the 2016 EU referendum provided no mandate for no deal.”
Mr Corbyn’s letter sought support for the no confidence vote, which he plans to table at the "earliest opportunity when we can be confident of success".
The aim is to call general election, in which Labour would campaign for a second referendum on EU membership, offering voters the option to remain.
Downing Street criticised the Mr Corbyn for planning to "overrule the referendum".
Liberal Democrat leader Jo Swinson, who is a Remain campaigner, also dismissed the Labour leader’s plan as “nonsense”.
"This letter is just more red lines that are about him and his position and is not a serious attempt to find the right solution and build a consensus to stop a no-deal Brexit,"she said.
But the SNP's Ian Blackford welcomed the Labour leader's letter and Plaid Cymru's Liz Saville Roberts also offered her cautious support.
Green Party MP Caroline Lucas said she would back a no-confidence vote but wanted Mr Corbyn to guarantee Labour’s support for another MP to lead a temporary Government if his bid to govern fails.