Labour leader, Jeremy Corbyn has used his first Prime Minister's Questions (PMQs) to put some of the 40,000 questions sent to him by members of the public to David Cameron.
Mr Corbyn was greeted with cheers as he rose to his feet at the despatch box, where he tackled the PM over housing, welfare cuts and mental health services.
He also called for a new approach at the weekly session, which is traditionally known for its rowdy atmosphere, and told the PM many voters had told him PMQs and Westminster as a whole was "out of touch and too theatrical".
The Labour leader's first question was about the "chronic lack of housing".
Responding, the PM congratulated the Labour leader on his election and said he hoped they could work together in the national interest.
Mr Corbyn took the PM to task over cuts to tax credits, which he branded as "shameful".
But Mr Cameron said there was a need to make work pay.
When jeered from the opposition benches, he said: "I thought this was the new question time" - and the cat-calls stopped.
"What we have to do is tackle the causes of poverty" Mr Cameron argued.
The Labour leader pressed the PM over the fairness of the welfare cuts.
Mr Cameron stressed the need to have "an economy where work pays".
The Prime Minister went on the offensive by questioning Mr Corbyn's appointment of John McDonnell in his shadow cabinet - and his attitude towards terror groups when responding to a question about national security.
Cameron makes a dig at McDonnell in reply to question on the IRA #PMQs http://t.co/QjelH5Q8pw
— The Telegraph (@Telegraph) September 16, 2015
Mr McDonnell has previously said that the role of some members of the IRA should be recognised for contributing towards bringing both sides to the negotiating table in Northern Ireland.
Jeremy Corbyn has also said that he supports the entering of dialogue with groups like Hamas and Hezbollah.
The Labour leader also tackled the PM over mental health services.
The British PM said more needed to be done in this area but improvements had been made, adding, "We will not have a strong NHS unless we have strong economy."
The SNP leader Angus Robertson said he hoped Labour would work with his party to oppose austerity. He accused the Government of failing to devolve promised powers.
This was rejected by the PM, who said the SNP leader had failed to say which promises had not been delivered and accused the nationalists of "bluster".
When tackled over the cap on public sector wage increases, Mr Cameron said increasing the tax threshold had delivered the equivalent of a pay rise for 29 million working people.
Reporting from IRN