The chairman of the Press Complaints Commission (PCC) Lord Hunt has said the press must "hit the ground" to reform its practices.
He said he was still not persuaded that underpinning the regulatory system by a statute is the right move.
Lord Justice Leveson says a genuinely independent and effective system of self-regulation is needed.
First snapshot of Lord Justice Leveson's Inquiry into the Culture, Practices and Ethics of the Press.
Nick Clegg sources say it is inevitable there will be differences between his response to the Leveson report and the Prime Minister's.