Tory MPs are being urged to back a general election as the party prepares for its fifth leader in just over six years.
Whoever wins the new contest for Downing Street will not have to set a national ballot box test until January 2025.
But the Mirror’s petition demanding a ballot passed 100,000 signatures today - and Keir Starmer called for a halt to the "ridiculous, chaotic circus" surrounding the Tories.
Seven and a half years after David Cameron warned of "chaos with Ed Miliband", the Labour leader said “we need a general election ” to “let the public decide” on producing a “stable Labour government”.
He added: "The country needs change, the country needs stability, the country needs to get rid of this chaos.”

It came as it emerged Labour has gained 20,000 members since the end of the conference season.
A Deltapoll/Mail on Sunday poll today yesterday gave Labour a lead of 25 points - putting it on course for an astonishing 320 Commons majority.
And Opinium recorded its largest-ever Labour lead of 27 points - with Keir Starmer's party on 50% and the Tories on 23%.
A staggering 30% of Tory voters in 2019 have switched to Labour, according to the survey of 2,000 Brits on October 19-21.
Labour’s leader said people are “fed up to the back teeth with” chaos that “has been going on for the best part of 12 years”.

“We don't need another change at the top of the Tory party, we need a change of government,” he told the BBC.
He added: “My focus is on the millions of people who are struggling to pay their bills, have now got additional anxieties about their mortgage.
“I know what it feels like not to be able to pay your bills, that happened to me and my family when I was growing up.”
But he refused to say if a Labour government would put up taxes to fill a financial black hole left by the Tories’ handling of the volatile economy.
He said he would need to see a watchdog report from the Office for Budget Responsibility first.
“I’m not going to write our manifesto on the programme,” he said.
“But I am being clear that we will be the party of sound money. We know there are tough choices to be made.”