The SNP's Stephen Flynn is next with a question about the war and humanitarian situation in Gaza.

He asks Sunak if he shares the same stance as President Joe Biden, who recently said he hopes ceasefire negotiations would be completed by this weekend.

Sunak replies saying that his party "supports the United States' draft resolution" and says that a ceasefire deal that will "collapse within days" is "not in anyone's interests".

However, the PM adds that the UK should be proud of the contribution of "life saving aid" to the people of Gaza.

James Sunderland, the Conservative MP for Bracknell, stands to mark the two year anniversary since Russia launched its full-scale invasion of Ukraine, and asks Sunak to assure the House that Britain's support to Ukraine will continue to be unwavering.

Sunak recalls recent measures of support, and says: "Our support will never waver."

Sunak says the last few weeks have seen MPs' homes surrounded, events disrupted and council meetings threatened.

He adds that the parliamentary rules had been changed because of intimidation.

"While he [Starmer] might want to bend to mob rule we will face down the extremists and stand up for British values," the prime minister says.

Image source, House of Commons

"The truth is these are no longer the Tories your parents voted for," Starmer says.

He says the PM has lost control of his party to "the hordes, the malcontents, the tin-foil hat brigade over there, the extremists who wrecked the economy".

When will he stand up to them, he asks, saying the Tory party is no longer trying to beat Nigel Farage but "giving up and dancing to his tune".

Sunak hits back by pointing to candidates in the Rochdale by-election who he says are antisemites.

A by-election prompted by the death of MP Tony Lloyd will be held in Rochdale tomorrow.

Labour withdrew its support from its candidate Azhar Ali over comments he made regarding Israel’s war in Gaza and Jewish people in the media. Ali has apologised for his comments.

It was too late for the party to replace Ali as its candidate, so he will still appear as such on tomorrow’s ballot. And he’s going up against ex-Labour MP George Galloway, for the Workers Party for Britain.

"We expel antisemites, he makes them Labour candidates," Sunak says.

Update: BBC News has approached Galloway for a response to this exchange.

You can read information about all the candidates in tomorrow's by-election in Rochdale here.

Starmer quotes the prime minister's comments from months ago, in which he said his party was welcoming to all, and links this to Nigel Farage.

Bringing this around to the values of the party, he asks whether the prime minister is simply too scared to stand up to the gaggle of MPs who moonlight as GB News presenters, or if he genuinely thinks Farage shares the ideals of the Tory party.

Sunak says his party has "a proud tradition of diversity" and a record that "puts Labour to shame".

He says the Conservatives delivered the first Jewish prime minister, the first female prime minister and the first prime minister of Asian origin.

He says Starmer can only champion men from north London, while the Conservatives represent modern Britain.

Image source, House of Commons

Starmer continues discussing Liz Truss as he says she claimed that Nigel Farage, the former UKIP and Brexit Party leader, was the man to restore the Tory party.

He asks if the prime minister would welcome Farage into the Conservative fold.

Image source, House of Commons

Sunak hits back at Starmer's comments on his leadership, saying he suspended Lee Anderson when he learnt about the comments.

"I act on my principles, he hasn't got any," Sunak says, referring to the Labour leader.

Sunak says that, when Starmer learned about antisemitic remarks from an ex-Labour candidate in Rochdale, he "personally backed him for days".

Chris Mason
Political editor

A couple of quick observations.

Lee Anderson is sitting next to Dame Andrea Jenkyns, one of the few Conservative MPs who has publicly called for Rishi Sunak to stand down.

The other thing that is very noticeable today: amid all the noise, the Speaker is remaining silent. He is not seeking to impose any authority on the chamber.

This is a week where his authority has shrivelled considerably - and we can see the consequences of that now.

Starmer next claims Sunak is being changed by his party, rather than changing his party for the better by allowing Liz Truss to stand in the next election.

He asks whether the Tories will take responsibility for the "ruin" of the country.

Image source, House of Commons

I don't believe a single MP supports Tommy Robinson, replies Sunak.

He accuses Starmer of standing by while "antisemitism ran rife in his party" and backing Jeremy Corbyn "who called Hamas friends".

Sunak says the Labour leader is "spineless, hopeless and utterly shameless".

Starmer turns to Sunak's predecessor, Liz Truss, who he says has spent the last week in the US "trying to flog her book".

He says she claims she was sabotaged by the "deep state", and failed to speak up when former English Defence League leader Tommy Robinson was praised.

Why is Sunak allowing her to stand as a Tory MP at the next election, Starmer asks.

Sunak accuses Starmer of "sniping from the sidelines", and says he's getting on with the job of government.

He goes on to list some of the government's projects and priorities.

Image source, House of Commons

Keir Starmer opens the session by asking the prime minister about Lee Anderson's place in the Conservative Party.

At what point did Sunak's party give up on governing and become the political wing of the flat earth society, he asks.

A reminder: former Tory deputy chairman Lee Anderson was suspended from the party after refusing to apologise for saying "Islamists" had "got control" of London mayor Sadiq Khan.

Chris Mason
Political editor

Lee Anderson is in the chamber.

It’s midday and the Rishi Sunak is on his feet, which means proceedings are about to begin.

Stay tuned as we bring you live updates, as well as political analysis from our colleagues at Westminster.

What do the polls say?published at 11:59 Greenwich Mean Time 28 February

11:59 GMT 28 February

On average, Labour has a 19 percentage point lead over the Conservatives in the opinion polls.

That’s based on the latest polls by eight different companies that have asked people their voting intention over the two weeks up to 26 February.

The vote share numbers exclude those who answered “won’t vote” or “don’t know”.

You can read more, see how things have changed over the past year and look at how the parties’ support has changed since 2020 in our interactive poll tracker.

A week can feel like a long time in politics.

And it was just last Wednesday that an SNP debate on Gaza descended into chaos after a decision over voting by Sir Lindsay Hoyle.

Hoyle broke with parliamentary procedure and decided the Commons would vote first on Labour's amendment before moving on to further votes on the SNP's original motion and then the government proposal.

The decision provoked fury on the SNP and Tory benches, and both parties walked out of the chamber in protest.

Labour’s call, for an “immediate humanitarian ceasefire, was passed without a formal vote.

Hoyle apologised, but for many this didn’t cut it, with dozens of SNP and Tory MPs joining together to sign a motion of no confidence in the Speaker, external.

PMQs is due to start soon and Hoyle has taken his place centre stage.

Hold on tight.

Image source, UK Parliament

Ten minutes to go - time for some more political news.

London Conservative MP and former minister Paul Scully has apologised for suggesting there are "no-go" areas in parts of Tower Hamlets.

He made the comment in radio and TV interviews on Monday, prompting accusations of Islamophobia and a rebuke from the prime minister.

Mr Scully had also said some people were "fearful for going out".

In a BBC Radio London interview on Tuesday, he said he "put his hands up" for using language he "regrets". Mr Scully added he was "frustrated in the language" he used and lost "nuance" in the issues he wanted to get across.

• You can read our full story here.