David Cameron challenges Harriet Harman to say whether Labour will back a cut in the overall welfare cap. But John Bercow intervenes to say that Ms Harman has had her final question and will not be able to respond.   

Harriet Harman says David Cameron can no longer blame the government's failings on the last prime minister "as it was him". She says the election was all about promises but now it is about delivery. 

Harriet Harman moves onto welfare, challenging the PM to say whether he is committed to not cutting child benefit and tax credits for the full five years of the Parliament. The PM responds that Labour have "learnt absolutely nothing", pointing out that Ed Miliband lost the election and Ed Balls lost his seat, adding "the messengers have gone but the message stays the same". 

The PM says Labour cannot back extending "right to buy" because it is the "enemy of enterprise". Mr Cameron says the last government built more council homes last year than in the entire 13 years of the Labour government. But Ms Harman says Mr Cameron "broke his promise" to replace all council homes sold with new stock on a one-for-one basis. 

David Cameron lists all the initiatives that the government has taken to boost home ownership and challenges Labour to back the extension of the "right to buy scheme" to housing association. Harriet Harman says home ownership has fallen since 2010 and insists Labour supports home ownership. 

Harriet Harman is on her feet. Her first question is on housing, asking whether the percentage of people owning their own home has gone up since 2010.

The first question is from Tory Alec Shelbrooke. He talks about "blue-collar conservatism" and the need for lower taxes, and rises in the minimum wage. Unsurprisingly, David Cameron agrees, noting that Mr Shelbrooke doubled his majority. The PM says the government is focused on "making work pay".

James Landale
Deputy political editor

Harriet Harman can be "very incisive" so David Cameron will be "kept on his toes", James Landale adds. Many of the newly-elected MPs will be experiencing the session for the first time, he notes and most will be watching rather than contributing. 

House of Commons
Parliament

Those tuning in to listen to the international development teams at the despatch box would have missed Shadow International Development Minister Mary Creagh's contribution. It seems the microphones are on the blink.

David Cameron is on his feet in the Commons with PMQs getting under way. 

The BBC's James Landale says the session is likely to be less boisterous than normal because of Charles Kennedy's death, leading to an "unusual atmosphere". He says Mr Kennedy was universally popular, "transcending party in the way few did". 

The Spectator

House of Commons
Parliament

The Speaker appeals to MPs thronging the benches and gangways for the parliament's first Prime Minister's Questions, that he understands the "sense of anticipation but must be able to hear the minister speak".