A former British Attorney-General has called for a review of all convictions involving evidence from "Fake Sheikh" Mazher Mahmood, and the fall-out from the undercover journalist's reporting has been described as "far more serious" than the phone-hacking scandal.
Solicitor Mark Lewis, who helped expose phone hacking at News International and who is now representing some of Mahmood's victims, told the BBC's Panorama programme: "The damage that's caused, the damage for people's livelihoods, the amount of people sent to prison, it's a far more serious thing than phone hacking ever was."
Mahmood, who works for the Sun on Sunday, the title which replaced his former paper the News of the World when it was closed down over phone hacking, is suspended pending an inquiry by his employer.
He is also the subject of a police investigation into possible perjury charges after the judge in the collapsed drug trial of pop singer Tulisa Contostavlos said he may have lied.
A string of cases involving evidence from Mahmood has recently been dropped by the police and Crown Prosecution Service.