Lammy is next asked about the ongoing war in Gaza and why Labour's top team isn't supporting an SNP Commons motion calling for a ceasefire in the conflict.

He says he hasn't seen the motion, but it's not a vote in the Commons that will bring about a ceasefire - it's the leaders in the region.

Pressed again on why Labour hasn't committed to back the motion, he says he doesn't see anything about the motion calling for a "sustainable" ceasefire.

He adds it will only be a political and diplomatic solution that brings an end to the war.

Lammy is next asked about working with former US President Donald Trump, who is almost certain to again be the Republican candidate for the White House in the presidential elections later this year.

Lammy says you'd be "hard pressed" to find any politician in the House of Commons, on any side, who hasn't expressed views about Trump's rhetoric, noting that Foreign Secretary Lord David Cameron once described Trump as a "misogynist".

The shadow foreign secretary says Labour will work with "whomever is in the White House".

"We are the closest of allies - it is a prevailing and strong partnership, it will remain that."

Lammy goes on to say that despite Trump's comments on Nato, as president he increased the number of troops in Europe and increased the spend to the alliance.

He says the US spends about 80% of Nato's full value, adding that he and other allies think the US will continue to do this.

Lammy is asked about whether Labour would bring new sanctions against Russia if the party wins the next elections.

He says the issue is one of "enforcement".

Lammy says if Labour wins the next general election and he becomes foreign secretary he will look closely at "plugging gaps" in existing legislation.

He says he is "concerned" about "dirty money" entering London and that there are gaps in the full implementation of the Russia report.

Next is Labour's shadow foreign secretary David Lammy.

He tells the BBC that his party has been calling for a special tribunal that deals with "crimes of aggression and against humanity".

He says he believes Russian President Vladimir Putin should be brought before such a tribunal and "held to account for all of his crimes".

Lammy adds that he expects there to a statement from the government on Russia in the House of Commons on Monday, and that Labour will back any sanctions put forward.

Laura is now interviewing Evgenia Kara-Murza, wife of jailed Russian opposition figure Vladimir Kara-Murza.

She says she was "horrified but not surprised" by the death of Alexei Navalny.

"This was a murder, for which Vladimir Putin is responsible," she says, adding that as long as he remains remains "unchecked" in the Kremlin, there will be more warmongering and deaths.

She says she has been afraid for her husband's life since at least 2015, and sleeps with her phone, dreading a call. But she says she has to always "fight that fear" and say "yes I am afraid, but that is not what is important right now. Continuing the fight is important".Kara-Murza also calls on Western leaders to get on the "same page" about aid for Ukraine.

The panel begins by talking about the death of Russian activist Alexei Navalny.

Douglas Alexander says the West was too slow in "recognising the character" of Russian President Vladimir Putin. He says the Kremlin bears a heavy responsibility for Navalny's death.

Robert Buckland says governments wanted to believe that Russia had changed. He says the Russian regime has blood on its hands.

Tracy-Ann Oberman said Navalny had effectively sacrificed himself to oppose Putin.

Sam Francis
Political reporter

The government has rejected claims by the ex-chairman of the Post Office that he was told to "stall" compensating sub-postmasters.

Henry Staunton, who left his role last month, claimed in an interview with the Sunday Times that he was told to delay payments to allow the government to "limp into the election" without taking a financial hit.

A source at the Business and Trade Department has told the BBC: "The claims are rubbish.

"[Mr Staunton] received a letter from a senior civil servant early in his tenure requesting he prioritise getting compensation to post masters.

"This sort of blame-passing was a feature of Mr Staunton’s time in the Post Office and emblematic of his lack of control over the organisation and why the board needed new leadership.

"As well as his poor judgement, Staunton was dismissed for blocking an investigation into his conduct."

And we’re live - Sunday with Laura Kuenssberg is now on air on BBC One, the BBC News Channel and BBC iPlayer.

Press Play above to watch the show. We’ll bring you live text updates, clips, reaction and analysis right here on this page.

One topic that could be brought up this morning is the news this week that the UK entered a recession at the end of last year.

The economy shrank by a larger-than-expected 0.3% between October and December, after it had already contracted between July and September.

The UK is classed as being recession if its economy contracts, or shrinks, in two successive quarters.

The figures raise questions over whether Rishi Sunak has met his pledge made last January to grow the economy., external

Read more.

Laura Kuenssberg
Presenter, Sunday with Laura Kuenssberg

Behind the huge headlines of Labour's victories and the Conservatives' by-election thumpings, it's worth paying attention to voters' instinct - not to choose one party or another, but to stay at home.

The two contests this week in Kingswood and Wellingborough have one important thing in common. In both places, the rise in Labour's share of the vote was dwarfed by the fall in support for the Tories.

In other words, the headline of Labour pummelling the Conservatives doesn't account for voters who chose neither of the big parties - or crucially those who chose to stay cosy at home.

It is as much about Conservative voters sitting on their hands as it is them transferring to Labour.

There is important evidence about the appeal of Reform UK, who have strong ambitions, whether or not Nigel Farage ever concludes his game of footsie.

But the big parties need also to look at those whose ballot might be "none of the above".

One former cabinet minister claims there is "zero appetite for switching to [Sir Keir] Starmer, but our voters are deeply, profoundly switched off".

Read more from Laura here.

Image source, PA/AFP

One topic we can expect to hear about on the show is this week's by-elections.

Just to remind you, Labour overturned big Conservative majorities to win the contested seats of Wellingborough, Northamptonshire, and Kingswood, South Gloucestershire. Wellingborough's result was the second biggest swing from Conservative to Labour in any post-war by-election.

Prime Minister Rishi Sunak responded to the defeats on Friday morning saying there were “particularly challenging” circumstances surrounding the two-by-elections, while Labour leader Sir Keir Starmer said the results showed the country wanted change.

As our polling expert Sir John Curtice notes, it was a very good result for Labour and Sir Keir Starmer, after a torrid week for his party, and another disappointing by-election night for the Conservatives.

You can read more of Curtice's analysis here.

As usual, we’ll also have a panel of guests joining Laura in the studio to discuss this morning’s interviews and political news. We’ll be hearing from:

Actress Tracy-Ann Oberman, known for roles including Chrissie Watts in EastEnders. She is currently playing Shylock in Shakespeare's classic The Merchant of Venice, with the play being transported to 1930s London.

Conservative MP Robert Buckland. The backbencher is a former justice secretary who also served as Welsh secretary under Boris Johnson and then Liz Truss before resigning from the role when Rishi Sunak took office.

Douglas Alexander, a former cabinet minister under Tony Blair who lost his parliamentary seat in Paisley South in 2015. He has been announced as Labour's candidate for East Lothian at the next general election.

Image source, Getty Images

Alex Therrien
Live reporter

Good morning and welcome to our live coverage of Sunday with Laura Kuenssberg.

This week’s political interviews are with Illegal Immigration Minister Michael Tomlinson and Labour’s shadow foreign secretary David Lammy.

We’ll also hear from Robin Simcox, commissioner for counter-extremism, and actor Matt Smith.

The show kicks off at 09:00 GMT - stay with us for updates, reaction and analysis. You can watch live on BBC One and iPlayer, or by clicking the Play button at the top of this page.