David Cameron announces an independent review of children's residential care, which will be led by a former Barnados chief executive.

SNP MP Kirsty Blackman attacks the tax credits policy - and asks whether the proposal was omitted from the Tory election manifesto as the party knew "it wouldn't be elected".

David Cameron responds with a defence of tax credits reform, saying nine out of 10 families were getting the benefits in 2010, including MPs.

Conservative MP Stephen Philips says David Cameron has demonstrated considerable leadership on UK aid to Syria. But the unforgotten crisis is the ongoing war in Yemen, he cautions, and asks that the UK "do more".

The PM says he is right to raise the matter. He says the UK is "a major contributor" in terms of humanitarian aid to Yemen. 

Labour MP Sharon Hodgson says the PM broke his promise on tax credits but says the final nail in coffin of compassionate Conservatism would be if he removed universal infant free school meals. She urges him to rule it out.

David Cameron says he was "immensely proud" it was his government that introduced the policy. "We'll be keeping it," he adds.

SNP Westminster leader Angus Robertson asks when the findings of a report on those committing suicide after their benefits were removed will be published. David Cameron says he'll write to him - but warns there are issues relating to it containing personal and medical data.

"Five times" the PM has been unable to say whether people will be worse off next April when the tax credit changes come into effect, says Jeremy Corbyn. "Please give us an answer to a very straightforward and very simple question," as he asks his final question.

He quotes from a letter from "Karen" who he says stands to be affected by the changes - and asks what the PM has to say to her.

The PM says she'll benefit next April from increases in the personal income tax allowance, adding that Labour's plan for the economy would mean working people like Karen "pay the price".

Jeremy Corbyn says the PM is refusing to answer the "fundamental question". This is not a constitutional crisis, but a crisis for three million families who stand to lose out from the cuts, the Labour leader warns.

Mr Cameron responds by accusing him of being a deficit denier and wanting to "borrow for ever". He says failure to reform welfare would mean deeper cuts in the NHS and police budgets and tells the Labour leader: "Get off the fence and tell us what to do.

"Tell us," Conservative MPs can be heard shouting.

Jeremy Corbyn isn't happy with the PM's answers - and again presses him to answer the question and spell out the government's policy on tax credits.

"The answer will be set out in the Autumn Statement when we set out our proposals," the PM replies.

Mr Cameron again notes that the Commons passed the tax credit cuts five times but Labour had to rely on unelected peers in the Lords to defeat the changes. "It's a new alliance. The unelected and the unelectable," he adds.

David Cameron says every penny not saved on welfare must be found in other government departments. Because of the Lords defeat there should be a debate about how to reform welfare. "I'm happy to have that debate," he says, but it's hard when Mr Corbyn "opposes every single welfare change". A strong economy requires welfare reform, he adds.    

Jeremy Corbyn tries again on tax credits - repeating his first question to the PM. David Cameron responds with a similar answer. He says the Commons have passed the tax credit cuts "five times" - even though the Lords voted them down on Monday.

Continuing, the Labour leader says people are very worried about the changes and asks the PM for more detail on what the government plans to do in the wake of the defeat.

Mr Cameron said the Conservative election manfiesto set out plans for £12bn of welfare savings. He's cut short due to the noise in the chamber, prompting Speaker John Bercow to call MPs to order.