This is from the Daily Mirror’s Dan Bloom.

The UQ is over. But Kevan Jones is raising a point of order. American officials are briefing on this, he says, even though Michael Fallon will not comment. He says Fallon should appear before the Commons defence committee to answer questions on this.

John Bercow, the Commons Speaker, says Fallon will have heard this point.

The SNP’s Tommy Sheppard says Fallon has taken questions for an hour, and not one MP has asked for operational information.

Fallon says he has been asked for operational information.

The “demonstration and shake down” test was successful, he says.

The SNP’s Deidre Brock asks if Fallon can confirm that the missile went the wrong way. That is an extreme form of friendly fire, she says.

Fallon says he cannot comment on that.

Philip Hollobone, a Conservative, asks Fallon to confirm that 160 Trident missile tests have taken place.

Fallon says he thinks that figure is broadly right.

The SNP’s Patrick Grady asks if any video footage was taken of this test.

Fallon says decisions are publicising these tests are taken in the light of national security considerations that apply at the time.

Chris Bryant, the Labour MP, says American officials are briefing CNN, and British officials are briefing the Sunday Times and the Guardian.

Fallon says secrecy should be maintained. But he is not responsible for what the Americans do, he says.

Here is Labour’s Tom Blenkinsop on Michael Fallon’s Commons performance.

And here is the Labour MP John Woodcock on Fallon.

Tony Perkins, the Labour MP, says the fact that more is coming out in the US on this than from the government will undermine faith in the nuclear deterrent.

Fallon says he does not accept that.

The SNP’s Steven Paterson asks if other mistakes like this have occurred. Or should he watch a White House briefing for details?

Fallon says he is not giving away operational details.

Labour’s Kevin Brennan says Fallon’s “don’t tell ‘em, Pike” approach is pointless because Congressmen and women in Washington will be told what happens.

Fallon says keeping these matters secret is in the national interest.

The Labour peer Stewart Wood says Michael Fallon seems to be adopting the “alternative facts” approach championed by Donald Trump’s aide Kellyanne Conway.

Michael Fabricant, a Conservative, says some people say MPs would have voted differently on Trident renewal last summer if they had known about this. But that is not the case, he says. Conservative MPs would have all voted as they did.

Fallon says he has tried hard not to confirm anything in his statement today.

Bernard Jenkin, a Conservative, says some of those Labour MPs complaining about the damage to Trident’s credibility do not even believe in the nuclear deterrent.

Labour’s David Winnick says, if the information about the failed test had been given at the time, there would have been far less publicity.

Fallon does not accept this. Previous governments have not given information about these tests, he says.

Labour’s Dennis Skinner asks how Trident can be independent when information is given to President Trump, a man who is as “thick as two short planks”, but not to MPs.

Fallon says the nuclear deterrent is operationally independent.

Labour’s Mary Creagh says a US official has confirmed to CNN that the missile did auto self-destruct off the coast of Florida. (See 4pm.) Why are MPs the last to be told?

Fallon says he does not give operational details of tests.

Carol Monaghan, the SNP MP, says her husband carried out a former nuclear missile test. Fallon said the crew and the submarine worked fine. But what about the missile?

Fallon says that Monaghan should not believe everything in the papers. He will not discuss operational detail, he says.

Michael Gove, the Conservative former justice secretary, says the unilateralists opposite are like “eunuchs complaining about the cost of Viagra”.

Fallon says he agrees.

But John Bercow, the Speaker, says he is sure this went down well at the Oxford Union.

(Implicitly, he seems to be accusing Gove of acting like a student.)

Crispin Blunt, the Conservative chair of the Commons foreign affairs committee (and the only Tory MP to vote against Trident renewal), asks what assessment has been made of the extra costs of Trident as the programme gets older.

Fallon says he will write to Blunt about this.

The SNP’s Douglas Chapman asks if Fallon will turn up to the defence committee tomorrow to discuss this.

Fallon says he is “pondering” where to accept the defence committee’s invitation.

Labour’s Ann Clywd asks Fallon to confirm that every missile test costs £17m.

Fallon says he cannot confirm that.

Here is the CNN story about the missile test failure.

This is from CNN’s Carol Jordan.

Vernon Coaker, the Labour former shadow defence secretary, says a leak of this kind undermines support for the nuclear deterrent.

Fallon says, whether Coaker likes it or not, he will not respond to speculation about this test.

Sir Gerald Howarth, a Conservative former defence secretary, asks Fallon to confirm that there have been 160 successful firings of this missile.

Fallon says the “demonstration and shake down” tests are important. HMS Vengeance successfully concluded this test, he says.

Labour’s Mike Gapes says deterrence relies on uncertainty. So is Fallon trying to increase deterrence by increasing uncertainty today?

Fallon says Gapes is right about uncertainty being an important aspect of deterrence.

Labour’s John Spellar says Jacob Rees-Mogg wanted the Commons to sit in private to save ministers from embarrassment.

He says in Lord Hennessy’s book, The Silent Deep, there is a full description of a previous test of this kind.

Fallon says previous governments have decided to release some information about these tests. He says a decision was taken this time on the basis of prevailing circumstances.

The Labour MP John Woodcock asks if there will be a leak inquiry into the source of the Sunday Times story.

Fallon says he is not confirming what was in the weekend press, and he would caution MPs against believing everything in the weekend press.

The Lib Dem MP Tom Brake says Britain’s enemies would have been aware of the failure of this test. So MPs should have been told, he says.

Fallon says, under international treaty obligations, other countries have to be told about tests like this. They were told.

But he does not accept Brake’s second point, he says.

Brendan O’Hara, the SNP’s defence spokesman, whose constituency includes the Faslane nuclear submarine base, asks who decided not to tell parliament about this problem.

Fallon says O’Hara should not believe everything in the papers about this.

He says that the government would not have asked MPs to renew Trident last summer if there was any doubt about its reliability.

Julian Lewis, the Conservative chair of the Commons defence committee, asks what David Cameron was told about this.

And will Fallon come to the defence committee tomorrow to answer questions on this, in closed session if necessary.

Fallon says he will not answer operational questions about this.

He says May and Cameron were of course told about the test.

Nia Griffith, the shadow defence secretary, says it should not have taken a newspaper story and an urgent question to get Fallon to address this.

Labour is not asking for operational detail, she says.

But Theresa May did not say a single word about this in the debate on renewing Trident last year. The public deserve the facts, she says.

Who decided to keep this quiet?

What investigation has been carried on into what happened?

She says there is a ”worrying lack of transparency” in this. May has “chosen to cover up” a worrying incident.

Fallon says neither he nor the prime minster are going to give operational details of our submarines, or of what is tested in the “demonstration and shake down tests”.

Fallon says HMS Vengeance passed its test, and has rejoined the operational cycle.

Kevan Jones, the Labour former defence minister, asked the urgent question. He asks Fallon if it is true that the missile veered off course. And why was the problem not revealed? Was that David Cameron’s decision?

Fallon is responding to Jones.

He says that he disagrees with Jones on his call for greater transparency on this matter. It has never been the government’s practice to tell parliament about “demonstration and shake down” operations.

In the past there has sometimes been some publicity about these tests. But that is done on a case by case basis, he says.

The Commons is about to hear the urgent question on Trident.

Jacob Rees-Mogg, the Conservative MP, has just tried to get the Commons to sit in private, on the grounds that these are secret matter. There was a vote by acclamation, but Rees-Mogg’s motion was defeated.

Michael Fallon, the defence secretary, will be responding to an urgent question about the Trident missile test error at 3.30pm.

Here is a Guardian video explainer.

Here are some more pictures from the regional cabinet meeting in Daresbury, near Warrington.

Michelle O’Neill is speaking at a news conference in Belfast now.

She says that for being a Sinn Fein activist is a fact of life.

She says she will not let people down. She has learnt from the best, including her late father and Martin McGuinness, she says.

She says she McGuinness is a “political giant” and a “legend”. She says she has learnt an enormous amount from him, she says.

And he is “not finished yet”, she says.

She says these are challenging times. But Sinn Fein has never been afraid of a challenge, she says.

As an agriculture minister she decentralised a whole department, even though she was told that could not be done, she says.

And as a health minister she allowed gay men to donate blood, because it was the right thing to do, she says.

She says after the election there can be no return to the status quo. Sinn Fein will only participate in the power-sharing institutions if they deliver for everyone, and if people are treated with respect.

She says the election will be about citizens making a stand. The principles of the Good Friday agreement must be honoured, she says. She says the GFA and subsequent agreements must be fully implemented, not renegotiated.

She says the British government is on collision course with the EU. Sinn Fein will defend the right of people in Northern Ireland to stay in the EU through special status, she says.

On the Daily Politics Julian Lewis said that, after his Today interview this morning, he got a call from Sir Craig Oliver, David Cameron’s former communications chief, saying Lewis was wrong to blame Number 10 spin doctors for covering up the nuclear missile test failure. (See 9.08am.)

Lewis is entitled to feel aggrieved. At the Number 10 lobby briefing the prime minister’s spokeswoman said the Ministry of Defence, not Downing Street, took the decision not to publicise the missile test. (See 1.17pm.)

My colleague Ewen MacAskill has written a good Q&A on the Trident story.

Michael Fallon, the defence secretary, will be responding to the UQ on Trident, the BBC is reporting.

Huffington Post’s Paul Waugh says David Cameron’s media team are denying being involved in the cover-up of the nuclear missile test failure. Julian Lewis blamed them in his Today interview this morning. (See 9.38am.)

Labour MPs Tristram Hunt and Jamie Reed have formally stood down from the House of Commons, paving the way for by-elections in Stoke-on-Trent Central and Copeland on February 23, the Press Association reports.

Under arcane rules governing MPs’ resignations, Hunt has been appointed steward of the Chiltern Hundreds and Reed steward of the Manor of Northstead - Crown appointments which bar their holders from sitting in the Commons.

I’m off to the Number 10 lobby briefing now. I will post against after 11.30am.

On BBC Radio 4’s Westminster House last night John Whittingdale, the Conservative former culture secretary, said Theresa May’s refusal four times to tell Andrew Marr whether or not she knew about the Trident missile failure when she spoke in favour of renewing Trident in the Commons debate a few weeks later was a mistake. He said:

Given it was the splash story of the Sunday Times it was fairly predictable that Andrew [Marr] would want to ask her about it. I don’t know if they had discussed what line she should take but I suspect her apparent inability to answer was not the best answer.

This is what Greg Clark, the business secretary, said on the Today programme this morning when asked if the government was willing to confirm that a Trident missile test went wrong. He said:

It’s been the long-standing policy not to comment on tests of weapons systems and, if that’s the approach that you take, I think we have to abide by that approach.

On Sky News a few minutes ago Clark was also asked about this, and used much the same line. Sarah-Jane Mee, the presenter, then put it to him that in the past the government has released information about successful Trident missile tests. Here is a story about one such test in 2012.

And here is video footage of that test on YouTube.

The crew of the submarine involved, HMS Vigilant, were later given a trophy for testing the Trident missile. This was written up here at length by the Royal Navy’s official newspaper, Navy News.

When this was put to Clark, he ducked the question, just saying that Trident has been an important part of the UK’s defence for many years.

Brendan O’Hara, the SNP’s defence spokesman at Westminster, told BBC Radio Scotland this morning that the government could not use “national security” as a reason not to comment on the Trident missile test failure. He said:

I think there’s two issues here. I think there’s an operational matter and I think there’s a very serious political matter.

I think the political matter is there was an attempted cover-up by the government. Something went terribly wrong with this experiment, with this launch, and the government for its own political ends decided to cover it up.

This was a particularly difficult launch, by the sound of it, and the fact that a Trident missile went astray, went veering off course towards one of our allies, is something that is deeply, deeply worrying.

This is not a national security issue. The government can’t, as they love to do, hide behind the national security smokescreen. The public, who are paying over two hundred thousand million pounds for this renewal, have a right to know if it works or not.

Here are the main points from Julian Lewis’s interview on the Today programme about the Trident missile test failure. Lewis is the Conservative MP who chairs the Commons defence committee.

• Lewis said David Cameron’s administration was to blame for what he described as the cover-up of the Trident missile test failure. (See 9.08am.) Whoever took the decision to cover this up deserved to be sacked, he said, before saying that Cameron’s team had all been sacked anyway.

• Lewis said that it was wrong for the government not to make a comment on Trident missile tests that fail when it does comment on ones that succeed. And he said he was “fairly sure” that ministers would end up commenting on this incident.

This sort of event is one that you can’t play both ways. These tests are routine, though infrequent, in this country, though they happen more regularly in America, and as is well known we share the missiles, so you must look at the tests in totality. And whenever they work, which is 99% of the time, films are released of them working. So whichever person decided that they wanted to draw a veil over one that did not work really should have been sacked. But as all that regime have been sacked now, I think hopefully a line can be drawn in the near future ...

I always think with something like this it is better to lay it on the line ... In the end you have always got to assume that something like this will come out.

• He said Trident missiles had been successfully tested more than 150 times in the UK and in America.

• He criticised Cameron for delaying the vote in renewing Trident until after the 2015 election. That was a “love gift to the Liberal Democrats”, he said, and an “outrageous decision”.

The BBC’s Laura Kuenssberg points out an obvious flaw in the argument that Greg Clark, the business secretary, deployed on Today this morning when he claimed the government never commented on matters like the Trident missile test. (See 9.08am.)