LONDON — Prime Minister Boris Johnson called on Thursday for a general election on Dec. 12 to break Britain's Brexit impasse, conceding for the first time he will not meet his "do or die" deadline to leave the European Union next week.

Johnson said in a letter to opposition Labour leader Jeremy Corbyn he would hand parliament more time to approve his Brexit deal but that lawmakers must back a December election, Johnson's third attempt to try to force a snap poll.

Just a week before Britain was due to leave the European Union, the bloc looks set to grant Johnson a Brexit delay, something he has repeatedly said he does not want but was forced to request by the country's divided parliament.

An election is seen by his team as the only way of breaking the deadlock over Brexit after parliament voted in favour of his deal, but then, just minutes later, rejected his preferred timetable which would have met his Oct. 31 deadline.

But he has twice failed before to win the votes in parliament for an election, where he needs the support of two-thirds of its 650 lawmakers. The main opposition Labour Party has repeatedly said it will only back an election when it is sure that he cannot lead Britain out of the EU without a deal.

"This parliament has refused to take decisions. It cannot refuse to let the voters replace it with a new parliament that can make decisions," he wrote to Corbyn.

"Prolonging this paralysis into 2020 would have dangerous consequences for businesses, jobs and for basic confidence in democratic institutions, already badly damaged by the behavior of parliament since the referendum. Parliament cannot continue to hold the country hostage."

In parliament after the government announced the new vote on an election for Monday, Labour's parliamentary business manager Valerie Vaz did not say whether the party would back the move, saying only it would wait to see what the EU says about a delay on Friday.

More than three years after voting 52%-48% to be the first sovereign country to leave the European project, the future of Brexit is as unclear as ever with Britain still debating when, how or even whether it should go ahead.

Johnson won the top job in July by staking his career on getting Brexit done by Oct. 31, though in the letter he makes clear he is ready to scrap his deadline. Last month, he said he would rather be "dead in a ditch" than ask for a delay.

But several of his aides think he can weather any criticism for failing to meet the deadline at an election by arguing that he was thwarted by lawmakers, doubling down on his team's narrative of pitting the "people versus the parliament".

At a meeting of his political cabinet of top ministers, some media reported that there was disagreement over whether the government should try for an early election, fearing that going to the polls before Brexit was settled might damage the governing Conservatives.

But Johnson seems to still hold out hope of securing a deal with Brussels, offering parliament until Nov. 6 to ratify an agreement he settled with the EU last week.

"This means that we could get Brexit done before the election on Dec. 12, if MPs (members of parliament) choose to do so."

Labour has long said it cannot back an election until a so-called no deal Brexit is off the table. But if the EU grants an extension until the end of January, that would appear to remove the threat of Johnson taking Britain out of the bloc without an agreement.

By proposing to dissolve parliament on Nov. 6, that would also be beyond the current Oct. 31 deadline.

Earlier, a senior Downing Street source said Britain would ultimately leave the EU with Johnson's deal despite the likely additional delay, with the EU considering offering London a three-month flexible Brexit extension.

"This ends with us leaving with the PM's deal," the Downing Street source said on on condition of anonymity. "We will leave with a deal, with the PM's deal."

All eyes are now on not whether, but by how long, the EU decides to extend the Brexit process: Berlin supports a three-month delay, while Paris is pushing for a shorter one.

While both German Chancellor Angela Merkel and French President Emmanuel Macron appear to be fatigued by Brexit, they fear a no-deal exit that would almost certainly hurt global growth, roil financial markets and create a potentially deeper EU crisis.

To offer Britain a long extension would take the pressure off British lawmakers to approve Johnson's deal and open up possibilities such as a referendum on it. A short extension might focus minds in the British parliament.

Brexit was initially supposed to have taken place on March 29 but Johnson's predecessor Theresa May was forced to delay twice — first to April 12 and then to Oct. 31 — as parliament defeated her Brexit deal by margins of between 58 and 230 votes earlier this year.

Johnson was forced by parliament on Saturday to send a letter to European Council President Donald Tusk requesting a delay until Jan. 31. He did so reluctantly, sending an unsigned photocopied note, but the correspondence was accepted.

"Our policy remains that we should not delay," Johnson told parliament on Tuesday after parliament defeated his extremely tight legislative timetable for ratifying the deal he clinched in Brussels a week ago. — Reuters