This is the key part of David Cameron's statement in which he raises concerns about Leveson's central recommendation of a statutory underpinning for the press regulation system:
I have some serious concerns and misgivings about this recommendation.
For the first time we would have crossed the Rubicon, writing elements of press regulation into the law of the land.
We should, I believe, be wary of any legislation which has the potential to infringe free speech and a free press.
In this House, which has been a bulwark of democracy for centuries, we should think very, very carefully before crossing this line.
A man who won libel damages after his arrest over the murder of a woman has written to MPs asking them to back Leveson's recommendations.
About 2,000 editors will sign up to a new independent press watchdog, the chairman of the Press Complaints Commission has said.
The Prime Minister has taken a political gamble by holding differing views to the victims, the Leveson inquiry and a majority of MPs.