Ms Harman suggests there is a lack of common ground in the Conservative Party over airport expansion - and says there have been No 10 briefings saying Heathrow expansion will not go ahead. She asks the PM whether he'll "stand up for Britain's interests or be bullied by Boris" (the London mayor who is firmly against Heathrow expansion). Don't believe everything in the morning's newspaper, the PM cautions, or pre-judge things - using it to highlight the recent child poverty figures which turned out to be better than had been expected by Labour.

Pressed by Harriet Harman over Sir Howard Davies's report on airport capacity, David Cameron thanks him for the work that has been done. He says there is support from almost all of the House on the need to expand airport capacity in the south-east. But he says it would be inappropriate to comment on the report before he has read it in full, and adds: "The guarantee I can give is that a decision will be made by the end of the year."

House of Commons
Parliament

House of Commons
Parliament

Harriet Harman says the Tunisian beach attack was an "attack on our values". On government efforts to challenge counter-extremism at home, she asks if there''ll be sufficient training and support for those that now have a duty to "prevent people from being drawn into terrorism". David Cameron says it is a very important strategy - stressing "it is an effort for us all" to prevent radicalisation. Ms Harman says he must get this right - and if he does, Labour will support him.

Ms Harman goes on to pay her condolences to the victims and families of those affected by the Tunisia beach attack. She calls for a dedicated taskforce to support those who have suffered. David Cameron confirms he will. He also tells the House the British death toll has risen to 27, and is expected to rise further.  

Acting Labour leader Harriet Harman is on her feet - and joins the PM in his congratulations to England's women's football team who she said had a fraction of the men's game's resources but were "showing the men how it's done". 

The first question to the PM comes from the SNP's Angela Crawley who raises concerns about the government's "English votes for English laws" plans. David Cameron says the proposals will be published "shortly" but says the government is not creating a "two-tier" system of MPs. Laws which only apply in England should only apply if supported by a majority of English MPs. That seems "fairness", he adds.

House of Commons
Parliament

And they're off. David Cameron begins by congratulating the England women's football team for reaching the World Cup semi-finals - and wishes them luck in the up-coming match.

Ahead of PMQs BBC political editor Nick Robinson predicts Labour may want to raise child poverty - with a statement from the government due a little later. It comes amid government plans to change the measure of child poverty. Nick Robinson says there's a perfectly good argument for changing it, but says the headlines may not look too favourable for the Conservatives.

Sadiq Khan, who is running to be Labour's London mayoral candidate, has warned that a third runway at Heathrow could "make things far far worse", on the grounds that air quality in London is "atrocious".

He described the caveats to Sir Howard Davies's recommendation of a third runway at Heathrow as "nonsense".

Mr Khan has instead called for an expansion of Gatwick airport together with a high-speed rail link between London and Gatwick and for the infrastructure around Heathrow to cope with "a better Heathrow rather than a bigger one".

We're moments away from this week's Prime Minister's Questions. Stay with us for live updates as the Commons drama unfolds.

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Labour's Mary Creagh says the most important thing is for the government to take a decision, warning of uncertainty for residents around Heathrow and Gatwick. This is all about "Tory party management", she adds, predicting they will "kick it down the road" until after the London mayoral elections in 2016.  

Communities Minister Brandon Lewis says it's right for the government to take time to look at the report. Asked if the party is facing an internal fight, he says it's right that local MPs make the case for their area, and the government must listen to that.

The Daily Politics

Asked if he'd vote against the government if it proposed Heathrow expansion, Stephen Hammond tells the programme: "I won't be voting for it" - pointing out that he has always been opposed to the building of a third runway at Heathrow. He doesn't agree with the notion put to him that it will split the Conservative Party.

House of Commons
Parliament

Responding to a question from Conservative MP Rehman Chishti regarding equality of opportunity in the civil service, Bernard Jenkins says that diversity in the senior civil service allows for a more "agile" institution.

Cabinet Office minister Matthew Hancock says the government has a programme under way to make sure that people from all backgrounds can get to senior levels of the civil service.