DAVID Cameron has not seen the emails and text messages the Prime Minister believes will exonerate Jeremy Hunt of allegations of inappropriate contact with the Murdoch empire, Downing Street said last night.

However, Number 10 insisted Mr Cameron "believes" the Culture Secretary has done nothing wrong.

Yesterday, in another day of high drama, the Prime Minister came out fighting on behalf of his cabinet colleague in an often tense and angry session with MPs.

Mr Hunt's special adviser, Adam Smith, resigned last week after admitting he had overstepped the mark in his communications with members of the Murdoch empire.

It followed explosive evidence from the Leveson Inquiry, including an email from a senior member of staff to James Murdoch claiming to tell him what Mr Hunt would announce to Parliament the next day.

In an attempt to draw a line under the outcry that followed, Mr Hunt announced on Friday that he was handing over private text messages and emails relating to the bid to the public inquiry, set up in the wake of the phone hacking scandal.

However, witnesses are under strict orders not to share details of their statements to the inquiry with others, the Prime Minister's official spokesman said last night. Downing Street batted away questions over whether Mr Cameron was prepared to release emails and texts between himself and other Murdoch employees, including Rebekah Brooks, the former editor of the News of the World, to the inquiry.

Labour had earlier been granted an Urgent Question in the Commons on the issue, meaning Mr Cameron was humiliatingly dragged back to the Commons to answer questions from MPs. The unusual move, thought to be the first time a Prime Minister has been brought back to Parliament in this way for a decade, forced the Conservative leader to cancel a number of campaigning events ahead of this week's local elections.

In the chamber itself, Mr Cameron insisted he would not hesitate to act if he was presented with evidence the Culture Secretary was guilty of wrongdoing.

He repeatedly insisted there was no need to refer the matter to the independent adviser on ministerial standards, Alex Allen.

Mr Cameron said there could be "no better" investigation than the public inquiry, where witnesses will have to give evidence under oath.

However, he appeared to agree with a call by one Labour MP for a further investigation into allegations that Murdoch's News Corp was provided with market-sensitive information over the takeover bid.

Labour accused him of hiding behind the "smokescreen" of the inquiry. Leader Ed Miliband claimed Mr Hunt had committed a number of clear breaches of the ministerial code, which governs standards and says ministers have overall responsibility for the actions of their advisers.

But Mr Cameron hit back, claiming Mr Hunt had taken responsibility by appearing before MPs to explain what had happened.

He later went on to tell Dennis Skinner that the veteran MP could draw his pension any time "and I advise you to do so".

Mr Cameron also accused Mr Miliband of having "no judgment" for Labour's call that Mr Hunt resign within 23 minutes of last week's evidence to the Leveson Inquiry. He said he was not prepared to pre-judge that the Culture Secretary has behaved inappropriately.

He told MPs: "It is the easiest thing in the world for the Prime Minister to stand at the Despatch Box and say to a member of the cabinet 'oh, it's all getting a bit difficult, off you go'."

But he asked Labour why, if the allegation of a "grand bargain" between the Tories and the Murdochs were true, would he initially have appointed Business Secretary Vince Cable, a well-known opponent of the Murdochs, as the minister in charge of the BSkyB deal.