MPs are called to Parliament on a special Saturday, which takes place on a crucial day for the future of Brexit.
Parliament will meet on 1
If an agreement is reached, Boris Johnson will ask MEPs for their consent – otherwise various options could be presented.
Laura Kuenssberg of the BBC says this may include her leaving without an agreement and stopping Brexit altogether
MEPs must agree on a business motion in the House of Commons for the meeting to take place.
If agreed, the additional day would coincide with an anti-Brexit march, which will be conducted by the referendum campaign and lead thousands of demonstrators to Westminster.
Labor leader Jeremy Corbyn says his MPs will be present and "do everything we can" to stop Brexit without agreement.
The Lower House has sat on only four Saturdays since 1939, also on the 2nd of September this year, as the Second World War broke out.
The last time was a Saturday session on September 3, 1982, due to the invasion of the Falkland Islands.
The Prime Minister said he was determined that the UK would leave the EU on 31 October, even though the Benn bill obliges him to ask the EU for a further delay in writing if a deal is not signed before 19 October in Parliament – or if the Members do not agree to a non-consensual Brexit.
The Scottish judges said Wednesday they would not decide on a legal challenge by activists who want to force the Prime Minister to send the letter – or to allow an official to send it on his behalf if he refused. They said they would postpone the decision until the political debate was "played out".
no. 10 has insisted that Mr. Johnson obey the law, but Laura Kuenssberg says talks are continuing on Downing Street about writing a second letter. This makes a delay unnecessary.
Mr. Corbyn said, "The idea that the Prime Minister will violate the law again must be considered."
He added, "The Prime Minister had the opportunity on October 19 to announce that he has followed the law, signed the letter and sent it to Brussels to request the extension gives us time to develop a reasonable relationship with Europe.
"We will do everything in our power to ensure that [Mr Johnson] makes this request."
The talks are ongoing between the UK and the EU, after Mr Johnson put forward new proposals for a Brexit deal aimed at replacing the Irish backing – the policy negotiated between Theresa May and the EU – the return of a hard line to prevent the island of Ireland.
The EU said that there had to be "fundamental changes" to the ideas put forward to make them acceptable.
For example wise, Irish Prime Minister Leo Varadkar told the British Parliament on Wednesday to take Dail's proposal to take Northern. Ireland's withdrawal from the EU Customs Union was a "serious problem" for its government.
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David Frost, UK's chief negotiator, will later meet representatives of the European Commission – but sources on both sides told BBC Brussels reporter Adam Fleming that the technical talks were actually reaching their limits.
Interior Minister Priti Patel, however, said that in recent weeks the government has done "very intensive" work to reach an agreement so that "nothing is over".
While it was still their preference to reach an agreement, they were "absolutely clear" that Britain would leave the EU on October 31, "whatever comes," she added.
Brexit Secretary Steve Barclay and EU Chief Negotiator Michel Barnier will also have lunch on Thursday to discuss the state of affairs.
When the clock is ticking in the direction of the summit, political tensions have risen.  A dispute broke out on Tuesday after source # 10 said a phone call between Mr. Johnson and German Chancellor Angela Merkel had made a deal "essentially impossible" and claimed it had a deal based on its proposals clarified, was "mostly unlikely". ,
Ms. Merkel's office said it would not comment on "private" talks.
But the President of the European Council, Donald Tusk, sent a public tweet to Mr Johnson accusing him of playing a "stupid blame game" – a criticism repeated by a number of opposition parties in the UK. [Tuesday, September 30, 2006] Mr Varadkar spoke with Mr. Johnson for 45 minutes, telling the broadcaster RTE that it was "very difficult" to reach an agreement before the end of the month.
However, it is expected that the two leaders will meet later this week for talks and Varadkar said he is "ready to work until the last moment to reach a deal", "only" not for every price".