Image source, House of Commons

Badenoch pushes back that Reeves is the one who "let [Starmer] down", saying that she "snatched the winter fuel payments" and put together a "disastrous budget" that "killed economic growth".

She also accuses Energy Secretary Ed Miliband of letting Starmer down by "putting up bills and killing jobs", and says he's now allied with Andy Burnham.

Starmer cites a fall in NHS waiting lists, new renters' and workers' rights and the lifting of "half a million children out of poverty".

He says this is all evidence that he is "leaving the country in better shape" than he found it, which is "more than can be said" for previous Conservative governments.

Brian Wheeler
Reporting from the House of Commons

Rachel Reeves is stony-faced as Kemi Badenoch turns her fire on the chancellor.

Tory MPs are enjoying this.

Badenoch says Starmer wouldn't "be in this mess" if Reeves had found money for the Defence Investment Plan.

She adds that the prime minister gave Reeves the second most important job in Britain and she wouldn't even stand beside him on Downing Street during his resignation speech.

Starmer defends Reeves' record, saying she pulled the country out of austerity and noted other economic improvements he's put to her name.

"With this chancellor we have the right economic plan," he says.

Image source, House of Commons

Starmer responds by saying he's "very pleased" with Labour's new MP Andy Burnham.

"Can I also say to her [Kemi Badenoch] in Gorton and Denton, the Tories got 1.9% of the vote," he says. "Can I congratulate her because in Makerfield they got 2.2%, just edging past Count Binface," he adds.

Starmer says it will take the Tories "500 years" to get back into power at that rate.

Meanwhile, he says his benches have delivered the biggest sustained boost to defence spending since the 1980s, referencing £270bn being spent over this parliament.

The Defence Investment Plan will take that even higher, he adds, saying the government will have it published before the Nato summit.

Image source, House of Commons

Kemi Badenoch begins by congratulating Starmer for being the "other party leader" who won a by-election last week, but jokes she is "much happier" with her new MP than he is.

• On the same night Andy Burnham became the new Labour MP for Makerfield, Douglas Lumsden won for the Conservatives in Aberdeen South

Badenoch moves on to defence spending, referencing the resignation of Starmer's defence secretary John Healey, who quit government over the long-awaited defence investment plan.

She says Healey accused the prime minister of being "unable" and the treasury "unwilling" to fund the defence of our country. "What changed?" Badenoch asks.

Chris Mason
Political editor

A Conservative heckler shouts out ‘Andy?’ when the prime minister mentioned the meetings he was having today.

It led to a smile from Sir Keir Starmer - who replied "not today!"

Chris Mason
Political editor

Image source, House of Commons

A huge cheer for the prime minister as he arrives in the chamber, with the chancellor Rachel Reeves alongside him.

There is no sign of Andy Burnham in the chamber for PMQs.

Keir Starmer is now on his feet at the dispatch box and PMQs has begun.

You can follow along by clicking watch live at the top of this page - and we'll bring you the key lines here.

Image source, House of Commons

It's approaching midday, which is when Keir Starmer will face questions from MPs for the first time since announcing his resignation as prime minister.

We'll bring you all the key lines here, and you can watch live at the top of the page.

Brian Wheeler
Reporting from the House of Commons

This is set to be a pretty weird PMQs - one of the last for Keir Starmer, before he stands down.

There is much speculation about whether Andy Burnham will show up. There is no sign of him so far.

Keir Starmer has just left No 10 and is on his way to the House of Commons.

He's due to face MPs there at midday, for his first Prime Minister's Questions since he announced he would step down as leader of the country on Monday.

Image source, PA

While we wait to hear from Starmer at PMQs this afternoon, here's a reminder of how each political leader has reacted to his resignation.

Conservative leader Kemi Badenoch said she felt sympathy for Starmer on a human level, but he "wasn't doing the job properly" as prime minister. Speaking on Monday, she said: "There are critical decisions that need to be made and the prime minister is setting out his farewell tour while Andy Burnham wants a summer holiday."

Leader of the Liberal Democrats, Ed Davey, said the public was sick of the "merry-go round" of prime ministers, but he told BBC Breakfast yesterday that he did not support calls for a general election.

Meanwhile, Reform UK's Nigel Farage has been vocal in calling for an election, saying the public are "sick of the game of musical chairs" taking place inside No 10.

Green party leader Zack Polanski told the BBC on Monday that the "jury is out" on Burnham, but his focus now is on winning the upcoming Greater Manchester mayoral election.

Scottish First Minister John Swinney said Starmer made the "right decision" in resigning and wished the prime minister and his family well, while his Welsh counterpart Rhun ap Iorwerth told BBC Wales that he wanted a "new relationship" with Westminster.

Image source, EPA/Shutterstock

Keir Starmer might have announced his resignation, but his schedule is rumbling on as normal for now.

At midday, he faces his weekly bout of Prime Minister's Questions - his first since announcing his plan to step down.

Later, the prime minister is travelling to Berlin for a meeting with his French, German, Italian and Polish counterparts.

The group are discussing preparations for next month's Nato summit, and we're expecting to hear from them later this afternoon.

We'll bring you all the key developments on this right here.

Image source, PA Media

Andy Burnham is yet to be chosen as the next prime minister but Labour MPs are already trying to influence his policy agenda.

Steve Yemm, the Labour MP for Mansfield, is calling for a shift on climate policy, telling Radio 4's Today programme that the UK spends too much on climate mitigation - such as reducing emissions - which he says will have "little impact" in the short term.

He tells Amol Rajan there is no doubt the UK is experiencing higher temperatures, flooding and heatwaves, but says because those things "are already with us", he would like to see more spent on "resilience and adaptation".

Yemm says if the UK cut its emissions to zero overnight, the effect would be "minor" in terms of global warming, and says some of the money spent on reducing emissions should be set aside for the cost of living, NHS, and defence.

You can read more here about why the record-breaking temperatures we're seeing in the UK show how our climate is changing here:

• The UK's summers are getting hotter - but how prepared are we?
• Why a 1976-style heatwave in the UK would be even more extreme today

A lack of growth is "the big problem" Andy Burnham would face if he becomes prime minister of the UK, says former director of the Institute for Fiscal Studies (IFS) Paul Johnson.

The UK has grown "very slowly" over the last twenty years, but is grappling with an interest rate on its national debt that's "higher than almost any other developed country", he tells the Today programme.

Tackling this would require "not just increasing taxes, but reforming taxes, reforming welfare", as well as "radically reforming regulatory and planning regimes", he says.

If he were to assume office, Johnson thinks Burnham's first action should be to "get on top of the welfare budget".

"It became a big problem for Rachel [Reeves]", he says. Burnham would "be at his strongest moment to get on top of the welfare budget as soon as he enters".

Kieran Kelly
Live reporter

Image source, EPA/Shutterstock

It has been a frantic few days in politics.

This time last week, Andy Burnham wasn't even an MP - and now the former Greater Manchester mayor is widely expected to become the next prime minister. Here's a reminder of how we got here:

19 June - Burnham emphatically wins the Makerfield by-election, taking more votes than all his rivals combined. He describes his victory as a "turning point", while Starmer insists he will fight any leadership challenge.

20 June - The prime minister is in Chequers, his country retreat, contemplating his political fate with his wife Victoria. It follows conversations with cabinet ministers, who urged him to step aside.

21 June - Signs start to appear that Starmer is about to resign - Business Secretary Peter Kyle tells the BBC that Starmer is reflecting on "political realities".

22 June - Starmer announces his resignation shortly after 9:30 BST, confirming that a new leader will be in place by 1 September at the latest - it is likely to be sooner.

Shortly after, Burnham boards a train from Manchester to London, where he is sworn in as the new MP for Makerfield. By this point, he has confirmed he will run to replace Starmer.

23 June - Starmer and Burnham hold secret talks as No 10 confirms the prime minister wants an "orderly transition".

24 June - The path to No 10 appears to clear for Burnham with Darren Jones, a senior cabinet minister, throwing his weight behind the former Greater Manchester mayor.

Image source, Andy Burnham

Image source, PA Media

With it now expected that Andy Burnham will want a new chancellor to replace Rachel Reeves if he becomes prime minister, one of her former political directors has defended her decision-making.

"It's not clear at the moment" what the rational for removing Reeves would be, says Matt Pound, who worked for the chancellor until March.

But he tells the Today programme: "We also have to accept that her commitment to fiscal responsibility has also caused consternation in the Parliamentary Labour Party, who do not feel that she has taken some decisions that have been helpful to them in getting re-elected."

"Tough choices" are part of fiscal responsibility, Pound says. "Somewhat unfairly, Rachel has borne the brunt on that."

• As a reminder, the chancellor's self-imposed fiscal rules mean by 2029/2030 she can only borrow to invest, rather than on funding day to day spending. She also has to ensure debt as a share of the national economy is falling by 2029. In May, Andy Burnham's campaign committed to sticking by these rules.

Image source, PA/Reuters

Keir Starmer met Andy Burnham for talks on Tuesday, as he seeks to ensure an "orderly" transition of power after announcing he is standing down as prime minister.

It is the first time the pair have met since Burnham won last week's Makerfield by-election. The hour-long meeting came as Starmer authorised access talks with civil servants for prospective Labour leadership candidates to prepare them for government.

Burnham is the only candidate to have emerged so far and if he does not face a challenger he could become prime minister as early as 16 or 17 July.

Access talks are normally granted to opposition party leaders ahead of a general election.

The PM's spokesman said the access talks will begin "as soon as possible" and before formal nominations for any Labour leadership contest close on 16 July.

The talks will focus on the "formation of government and key policy priorities", the PM's spokesman added, and would include security briefings.

• You can read more here

Image source, Reuters / House of Commons

When Keir Starmer faces MPs today, he might be quizzed over the long-awaited publication of the defence investment plan.

Despite his resignation as prime minister, the plan will be published ahead of next month's Nato summit.

That's despite the proposals triggering the resignations of two ministers earlier this month - Defence Secretary John Healey and Armed Forces Minister Al Carns (who could still enter the contest to replace Starmer - see our previous post).

The decision to press ahead with the defence plans could cause tension with Starmer's successor.

Andy Burnham and his team have been discussing that with Healey - who warned when he resigned that the PM's plan "well short of what is required".

Speaking on Tuesday in the House of Commons, Chancellor Rachel Reeves confirmed the plan would be published before the Nato summit n 7 July, and said it would "involve more money, spent more effectively and meet the scale of the challenges we face".

The prime minister's chief secretary Darren Jones might have ruled himself out of the Labour leadership contest - but former Armed Forces Minister Al Carns could still challenge Andy Burnham.

Speaking to BBC Newsnight on Tuesday, Carns insisted he is "pretty serious" in considering a leadership bid, but wants to "see behind Andy Burnham what the policies are" before making a final call.

As a reminder, leadership nominations open on 9 July and run until 16 July. Potential candidates have until then to amass the support of at least 81 Labour MPs to enter the race.

Asked whether he will back Burnham if he agrees with his policies, Carns tells BBC Newsnight: "I think that's a collective view across the Labour Party as a whole."

He explains the party wants to "get behind" Andy but says "we need to see that material before I can make a decision to back anyone".