Back to Tory chairman James Cleverly's defence of the prime minister earlier.

He told the BBC the "deeply uncomfortable" atmosphere in politics is unlikely to be resolved until Brexit is delivered.

Speaking on Radio 4's Today programme, Mr Cleverly said opposition parties preferred to "continue the circular argument around Brexit" rather than put it to bed.

"It is creating a highly-charged and uncomfortable atmosphere," he said.

"The Conservative government and the Prime Minister, Boris Johnson, are trying to resolve this but the Opposition parties are refusing to do so.

"This can be de-escalated, the tempers can be taken out of this. But in order for that to happen, there needs to be a balance on both sides."

Speaker John Bercow has urged MPs to "treat each other as opponents, not enemies", after Wednesday's angry exchanges about Brexit and the PM's language.

House of Commons
Parliament

The SNP's Peter Grant criticises the prime minister for not coming to answer the urgent question.

He tells the Commons: "What an extraordinary position we're in when we have to ask whether the prime minister will obey the law of the land."

Mr Grant said MPs had "not yet had a satisfactory answer" on whether Boris Johnson will ask for the extension if a deal isn't agreed.

Brexit minister James Duddridge says there will be "no shilly shallying" and the law "will be obeyed".

House of Commons
Parliament

Brexit minister James Duddridge minister says the government will obey the law but also not seek an extension.

But former Justice Secretary David Gauke questions what legal argument there is that the PM has any choice.

"The law is quite clear," says Mr Gauke. "He would have to seek an extension".

Mr Duddridge says he will not get into "hypotheticals".

House of Commons
Parliament

And in the Commons the shadow Brexit secretary is on his feet - accusing the government of "whipping up division", saying he has "not seen that in my life time".

Sir Keir Starmer claims Parliament is at a "low point", and asks whether the PM will comply with the law and ask for the extension.

Sir Keir says: "If he does not, this will be enforced int he courts and we will take collective action in this House".

Minister James Duddridge, meanwhile, says the government will comply with the law, but adds: "One of the reasons we are at a low point is we asked the public for its view, and Parliament is now ignoring it".

Shadow Brexit secretary Sir Keir Starmer has tweeted a copy of his open letter to Michael Gove -which challenges the cabinet minister about the government's Operation Yellowhammer no deal planning measures.

In it he said he is "deeply disappointed by your [Gove's] disregard and flippant response to the questions" asked by Sir Keir and his colleagues.

"This morning I have written to Michael Gove demanding answers about Operation Yellowhammer," he tweeted. "A no deal Brexit is not a game.

"Yesterday, the public were subjected to the spectacle of a government minister playing politics with the future of our country."

House of Commons
Parliament

Ian Murray echoes his sentiment of friendship and calls for respect from across the House.

But the Labour MP then says: "The Supreme Court decision this week and the debate in the House with the prime minister was a national embarrassment.

"In any other political equilibrium, he would have seriously considered his position.

"Many people have lost their jobs in government for a fraction of what he has done."

But back to the law...

He says there are two conditions to the act.

The PM has to ask for an extension to Brexit if:

• MPs have not agreed to a deal with the EU
• MPs have not agreed to leave without a deal

Mr Murray asks what the PM meant when he said "no" last night to whether he would ask for an extension.

He adds: "Quite frankly... I am sure there are very few people in this House and in this country that trust the words of the prime minister."

House of Commons
Parliament

The Commons gets under way with an urgent question from Labour's Ian Murray on the bill to block a no-deal Brexit.

It calls on the prime minister to ask the EU for an extension if a deal hasn't been agreed by MPs by 19 October.

The Labour MP asks the prime minister to make a statement on whether Boris Johnson will follow it.

Instead he gets a response James Duddrigde, a minister from the Brexit department.

He calls Mr Lavery his "honourable friend", and wants to make the point that MPs work together and have friendships.

Moving onto the question, he says: "The government will obey the law. This has always been the case."

BBC News Channel

The prime minister was "invoking the language" of Jo Cox's murderer in the Commons yesterday, says Labour MP Peter Kyle.

"Either it was a political strategy to see where the upset and hurt was caused - and to zero in on it - in order to provoke us into voting no confidence or giving him a general election.... or it was the actions of a sociopath who has absolutely zero emotional intelligence," he says.

The prime minister has - so far - not addressed the row over his choice of language in Parliament, and instead took to Twitter this morning to post a promotional video.

In it, he promises to "leave the EU on October 31st, invest more money in the NHS and crack down on violent crime".

House of Commons
Parliament

Before business begins in the Commons, Speaker John Bercow wants to address last night.

He says there has been a widespread sense that "the House did itself no credit".

Mr Bercow adds: "There was an atmosphere in the chamber worse than any I've known in my 22 years in the House.

"On both sides passions were inflamed, angry words were uttered [and] the culture was toxic".

"This country faces the most challenging political issue that we have grappled with in decades there are genuine heartfelt, sincerely subscribed to differences of opinion.

"Members must be free to express themselves about it and display the courage of their convictions.

"It ought, however, be possible to disagree agreeably."

Laura Kuenssberg
BBC political editor

"I'm not sure that we can look the nation in the eye and say that was a good day."

That's how a Conservative MP has described the torrid scenes in the Commons in the last 24 hours.

Outrage is a common currency these days, but MPs' jaws dropped as Mr Johnson ramped up the rhetoric in responses to questions - suggesting first that it was "humbug" for a Labour MP to demand he temper his language, to try to protect MPs' safety.

Then, he went on to say that the appropriate legacy for the MP who was murdered during the referendum, Jo Cox, was for MPs to complete the Brexit process.

No surprise that Labour MPs howled in protest, some left the Commons in disbelief.

And there may be few Tory MPs willing, as the day goes on, to defend how far he went.

Read more from Laura here.

Conservative Party Chairman James Cleverly said the debate over Brexit in the House of Commons "generates a huge amount of temper on both sides of the Commons".

He told BBC Radio 4’s Today programme: "The best thing we can do to calm things down is to get it delivered, get it resolved.”

But Mr Cleverly said the accusations levelled at the prime minister were "deeply unfair" adding he had never described people as "traitors".

He also said Mr Johnson was desperate to resolve Brexit, adding: "I cannot see how this is going to calm down until the big issue which has caused such division is resolved."

Speaking to Radio 4's Today programme, Brendan Cox, the husband of murdered Labour MP Jo Cox, said: "I feel a duty and an obligation to tell people to step back."

He said "bad behaviour" was not limited to one side of the debate and said words such as "coup" and "fascism" are also "inflammatory".

The immediate backlash in the Commons was palpable.

Labour leader Jeremy Corbyn said the PM's language "was indistinguishable from the far right", while his Liberal Democrat counterpart Jo Swinson said Boris Johnson's comments were "a disgrace".

She also told MPs that earlier on Wednesday she reported a threat against her child to the police.

Former cabinet minister Amber Rudd - who quit the government and the Conservative Party over Mr Johnson's approach to Brexit – later told ITV's Peston programme the prime minister's comments were "dishonest and dangerous".

And the Conservative former cabinet minister Stephen Crabb told BBC Newsnight that he was "shocked by the way [the PM] responded to the remarks about Jo Cox".

But there was also a response by Jo Cox’s husband, Brendan.

During the statement, he tweeted that he felt “a bit sick” about his late wife’s name being used in the way the prime minister had.

This morning, speaking to BBC Radio 4’s Today programme, he said Mr Johnson had been “sloppy” in his use of language and he was “shocked” to hear it.

But Mr Cox said the PM had made the comments “in the heat of the debate”, and he didn’t think he was an “evil man”.

It was a busy day in the House.

After the Supreme Court ruled on Tuesday that the suspension of Parliament was unlawful, MPs were summoned back to the green benches.

A raft of government statements followed, but it was the fourth one by Boris Johnson that caused the most controversy.

He responded to the Supreme Court’s ruling by saying the court was “wrong to pronounce on a political question at a time of great national controversy".

The PM also challenged the opposition parties to table a vote of no confidence or back a general election and face a "day of reckoning" with voters.

MPs called on Mr Johnson to moderate his language after using words like “surrender” and betray”, saying death threats the MPs had received included such terms, and referencing the murder of Labour MP Jo Cox.

But Mr Johnson dismissed the first intervention on the issue as “humbug”, later adding the best way to honour the late MP was to get "Brexit done".