Scotland's first minister Nicola Sturgeon has written to the prime minister urging her not to waste the "gift of more time" following the extension of article 50 until late October.

In the letter, the first minister also called for ongoing Brexit talks to include the devolved administrations, and for any deal agreed by the UK parliament to be put to a second referendum.

Image source, UK Parliament

Conservative Brexiteer Peter Bone has predicted that the prime minister will resign and is backing Boris Johnson to lead the party.

"I was very disappointed because the prime minister said originally we were going to come out of the EU on March 29 - she said that 108 times.

"She said to me in March that she'd only go for a short extension and take us out no later than June 30. Unfortunately now we have an extension to October 31.

"I think Boris Johnson is the only one who can unite the county and win a general election.

"He very successfully ran London as mayor - he's the right man for the job."

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Sebastian Payne, of the Financial Times, says that "we shouldn't have expectations" that the six-month delay can really "achieve anything".

A change of leadership would lead to a further change in dynamic with the EU, and a further extension, he says.

Katy Balls, of the Spectator, says that the extension could lead to a leadership contest, although Mrs May is showing no signs of wanting to go.

"There's been so many attempts to rally people around...and it hasn't really worked" in trying to get MPs to vote for the withdrawal agreement.

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Labour's Bridget Phillipson says that the "form of Brexit that the British people were promised cannot be delivered".

She advocates a second referendum as a way to solve the stalemate in Westminster.

"This is a decision that would define our country for generations to come," she says, ans she wants to be "confident" that people are happy before they proceed with Brexit.

"This process is far more complicated than any of us could have possibly imagined," she adds.

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Conservative Brexiteer Pauline Latham says that the prime minister has "failed" and that it is time that "somebody else had a chance" to "take the UK forward".

"Otherwise we are just going to be in the same situation that we are now in six months' time," she says.

"She said she'd go" says Ms Latham, adding that Mrs May should announce when she plans to leave so that the party can prepare for a leadership contest.

The flexible Brexit extension until Halloween given to the UK by EU leaders prompts a spirited response from Europe's papers.

But it's what the wrangling in Brussels means for EU unity ahead of European Parliament elections next month that preoccupies many in the media.

For France's Le Monde, it's a "Halloween Brexit... due on 31 October, the Anglo-Saxon holiday of pumpkins and witches".

It says President Emmanuel Macron backed Prime Minister Theresa May's request for a short delay until 30 June but "was forced to compromise". The leaders finally split the difference with a typically European compromise: "they cut the pumpkin in half".

France's Libération believes the extension came at the cost of breaking the united front of EU leaders.

"This increasingly incomprehensible waltz of dates shows that the UK has succeeded in exporting its byzantine internal battles to Brussels. For this summit broke to pieces the nice, united European front which held together, for better or for worse, for three years."

Read more from Europe's newspapers here.

Image source, Press Association

DUP leader Arlene Foster, together with Tories Iain Duncan Smith and Owen Paterson, have been holding talks with Michel Barnier, the EU's chief Brexit negotiator.

She says the party "wanted to have the unionist voice heard so that he could hear the impact of the backstop and what it will do to the balance in Northern Ireland.

"We had good engagement around that issue today," she says.

Brexiteer Iain Duncan Smith said the meeting "also went on to discuss what the alternative arrangements were and what possibilities there were around the border.

"It was a pretty open and straightforward conversation. We are going to let the government know when we get back what was said."

Asked if she still had confidence in Theresa May, Ms Foster says "as you know the confidence and supply agreement that we signed was with the Conservative party and whoever the leader of the party is we will work with.

"We believe in national stability. We want to see Brexit delivered."

Chris Page
BBC News NI Political Correspondent

By opposing the Brexit backstop, the DUP is actively working against the best interests of people the party claims to represent, Sinn Fein deputy leader Michelle O'Neill has said.

She was commenting as DUP leader Arlene Foster travelled to Brussels to accuse the EU of ignoring the views of unionists here.

"I'm sure the irony of Arlene Foster's comments won't be lost on those unionists who voted on a cross-community majority basis against Brexit in the first place," Ms O'Neill said.

"Those people have seen their wishes ignored by the DUP ever since as they continue to pursue a reckless Brexit agenda alongside their allies on the hard right of the Tory party, as evidenced by Arlene Foster being accompanied today by Tory MPs Iain Duncan Smith and Owen Patterson.

"The DUP should drop the pretence of defending anyone's interests but their own because it is abundantly clear that they are now actively working against the best interests of the people and industries they claim to represent."

Image source, European Photopress Agency

Foreign Secretary Jeremy Hunt has reiterated that Theresa May wants to "deliver Brexit for the British people as quickly as we possibly can".

"We don't have a majority in Parliament, this news gives us the time necessary to find a way to get a majority in Parliament to deliver Brexit.

"What people and businesses up and down the country want is for this issue to be resolved.

"It's been going on for much too long. So I hope this will give us a chance to get the Brexit deal over the line."

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The SNP's Kirsty Blackman says the delay to Brexit must be used "wisely", adding that the "only sensible option" now is to have another referendum.

She says Labour "hasn't been strong enough" in pushing for this outcome.

She predicts the party would "pay dearly" in Scotland if it supports a Brexit deal which ends freedom of movement.

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Labour's Hilary Benn says there has been a "collective exhalation of breath" from businesses that the prospect of a no-deal Brexit this week has been avoided.

The MP, who chairs the Brexit select committee, says the "only way to resolve" the impasse over Brexit is to put any deal agreed in Parliament "back to the British people".

He says "a lot of Labour MPs" wouldn't vote for a deal if it did not include a commitment from the government to hold a confirmatory referendum.