JK Rowling has said she feels "duped and angry" by David Cameron's refusal to back a new newspaper watchdog with legislation, as recommended by the Leveson Inquiry.
The Harry Potter author spoke out as a petition calling for the new regulator was signed by tens of thousands of people online.
ITV News's Political Correspondent Alex Forrest reports:
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.