Lord Justice Leveson's long-awaited report into press standards is set to be published amid fears its recommendations could throw the Government into turmoil.

The 2,000-page document is due to be unveiled at 1.30pm, with the judge widely expected to suggest a new newspaper regulator underpinned by law.

David Cameron set up the Leveson Inquiry in July last year in response to revelations that the News of the World commissioned a private detective to hack murdered schoolgirl Milly Dowler's phone after she disappeared in 2002.

The probe, set to cost around £6 million overall, heard months of dramatic evidence from celebrities, media figures, politicians and the police.