The Labour leader said he would call a vote of no confidence in Boris Johnson’s government as soon as he could be “confident of success” in bringing the government down.
He would then use the 14 subsequent days to invite anti-no deal MPs in parliament to back him to lead a temporary government to ask the EU to delay Brexit, and to call a general election.
In a letter to opposition party leaders in Westminster and key Tory Brexit rebels including Dominic Grieve and Oliver Letwin, he said Labour would use that election to campaign for a second referendum which would include “an option to Remain”.
But the Liberal Democrats dismissed the Labour leader as being the right person to lead a temporary government, while Downing Street criticised him for planning to “overrule the referendum”.
It comes after Corbyn wrote to cabinet secretary Sir Mark Sedwill urging him to stop Johnson forcing through a no-deal Brexit in the middle of an election campaign. Corbyn said he had received a “non-committal” reply from Sedwill.
The PM has not ruled out delaying an election triggered by a vote of no confidence until after Brexit to fulfil his pledge that Britain will leave the EU “do or die” on Halloween.
In response, anti-no deal MPs are discussing the formation of a cross-party national unity government with a respected backbencher as PM, such as Letwin or Labour’s Hilary Benn.
But they fear that Corbyn’s refusal to back anyone but himself will scare Tory rebels away, as they would rather go through with a no-deal Brexit than put the Labour leader in Number 10.
In an attempt to reassure MPs reluctant to put him in Downing Street, Corbyn insisted he would not enact any Labour policies other than calling an election and delaying Brexit.
He wrote: “This government has no mandate for...