The PM is asked about the situation for Ukrainian refugees coming to the UK under government schemes, in particular, about safeguarding.

Johnson says one of the reasons people initially complained about the scheme being slow was because of efforts to make sure people had a safe environment when they arrived.

Concerns are also raised about Ukrainian households needing help under homeless prevention measures - to which Johnson says councils have a duty to deal with any who have problems with their sponsors.

"We're not currently aware of any Ukrainian sleeping rough," he says.

Asked if he's concerned Ukrainian women could turn up trafficked onto the beaches of Dover, he says "that is not happening, we have safe and legal routes".

Angus MacNeil asks if the prime minister will still be in post tomorrow. He says he's had more resignations than any PM since 1932.

Boris Johnson says "of course," but he is appearing in front of the committee "to talk about what the government is doing".

Boris Johnson is asked if he met with Alexander Lebedev without officials on 28 April 2018 when he was foreign secretary.

Johnson says he can't recall exactly what happened on that evening.

A follow up question asks if he has met Lebedev without officials at any point.

Johnson says he has met him on different occasions without officials. He says he thinks he did mention it to officials that he had met with him.

Back with Boris Johnson's appearance at the Liaison Committee.

He's been asked about a range of topics - Ukrainian refugees coming to Britain, delays to passport renewals, and an asylum application backlog

The PM's answers to these issues? In brief, refugees need to be screened; demand for passports has been "very big"; and legal teams are finding reasons why people shouldn't be returned to their country of origin.

Safeguarding Minister Rachel Maclean has become the latest minister to resign.

The Redditch MP says Boris Johnson must go "for the good of the country and our party".

In her resignation letter, she says recent events demonstrate that while he remains in office the "woefully low rate of prosecutions for sexual offences" will not improve.

Boris Johnson haemorrhaged support from fellow Conservatives today. But what do the public think?

A recent survey by YouGov tracking the PM's popularity shows his ratings have slumped again to below minus 50%.

The survey was carried out before the travails of the past 24 hours, it's worth noting.

However a snap poll by YouGov , externallast night reported that 69% of Britons wanted Boris Johnson to resign.

Image source, .

It's getting hard to keep up with the number of resignations now. Here's another - Rachel Maclean, a junior minister in the Home Office.

In a tweet, external, she says: "It remains the greatest honour of my life to represent Redditch in Parliament and I will continue to support the policies which I was re-elected to deliver from the backbenches."

Leila Nathoo
BBC political correspondent

As the stream of resignations from government and declarations of no confidence from the backbenches continues, it's worth noting that Boris Johnson is haemorrhaging support from right across his party.

From recently elected MPs in former Labour seats who had been his most vocal backers, to senior Tories reluctant to ever break ranks with the leadership - criticism is coming from all corners, leaving Boris Johnson with few places to turn to for support.

Image source, .

MP for Montgomeryshire Craig Williams is the latest Parliamentary Private Secretary to resign.

In his resignation letter, posted on Twitter, external, he says it's becoming impossible to rebuild trust with the public and focus on delivering good policies.

Mark Logan, Conservative MP for Bolton North East - one of the new generation of so-called Red Wall Tories - has resigned his post as a Parliamentary Private Secretary.

"There is only so much anyone can expect my constituents to accept and ignore," he wrote in his letter of resignation, external.

Former Justice Secretary Robert Buckland, who has repeatedly defended Boris Johnson until now, has joined other Conservatives colleagues in calling for the PM to step down.

The South Swindon MP told BBC Radio Wiltshire "the PM must resign".

Image source, HoC

If you're waiting - like us - for the PM to address matters surrounding his leadership, Boris Johson was told he’ll face questions about "integrity and politics and related matters at the end of the session".

The Liaison Committee’s chairman Sir Bernard Jenkin did ask if he wanted to "dispose of those matters immediately first" - but Johnson said he was happy to take Sir Bernard’s lead.

We’re now some 30 minutes into the session and so far the PM’s only been asked about the war in Ukraine.

MP for Bishop Auckland Dehenna Davison says she has submitted a second letter of no confidence in the PM to Sir Graham Brady, who chairs the backbench 1922 Committee.

In a letter posted to Twitter, she says: "I wrote to you some months ago expressing my lack of confidence in the prime minister. In the time that has followed, nothing has improved - in fact, further lies have been peddled, and more good colleagues have been sent out to defend the indefensible.

"Things have got worse, and our country deserves better."

Angus MacNeil, Chair of the International Trade Committee, asks if Johnson intends to get the permission from the Queen to have a general election - or if he can just demand one.

Boris Johnson says the people of this country probably don't want an election right now.

Leila Nathoo
BBC political correspondent

Despite everything that is swirling in Westminster today, Boris Johnson is still prime minister.

Even so, it does feel a bit like a parallel universe watching him calmly answering questions on important matters of state like the situation in Ukraine in a functional committee room, while elsewhere on the parliamentary estate, others are discussing his downfall.

Duncan Baker, who's a parliamentary private secretary in Michael Gove's department - Levelling Up, Housing and Communities - has now resigned from his post.

In a statement on Facebook, the MP for North Norfolk said the recent by-election results were more than "mid-term blues".

"The breakdown in trust from the last six months is abundantly clear. The latest situation to unfold regarding Chris Pincher only compounds those feelings, with many now recognising the situation is clearly unsustainable.

"I must remain true to my values and principles."

Nick Eardley
Political correspondent

A senior ally of the PM told the BBC: "It's now a question of how he exits."

The MP said they had pledged the PM full support but added: "This is not sustainable."

They also predicted the leadership contest would be a disaster for the Conservative Party.

Image source, Getty Images

The BBC's political editor Chris Mason says Michael Gove has told the PM he must go.

The Levelling Up, Communities and Housing Secretary initially backed Boris Johnson in the 2016 Tory leadership race which was ultimately won by Theresa May. Later, though, he decided he was not up to the job and chose to run against him.

Boris Johnson says efforts of UK diplomacy and armed forces strategists have been "considerable" in recent weeks towards Ukraine.

He says the government is helping Ukrainians with de-mining areas of the country, as well as "doing what we can" to help small packets of grain to leave the country on rail routes.

"You're starting to see some growing quanities of grain" leaving through land routes.

The chair of the Foreign Affairs committee Tom Tugendhat is up first.

He's asking Johnson if he’s able to concentrate on the alliance of countries brought together to dissuade Russia against further actions and push them out of the Ukraine's eastern Donbas region.