Hugh Grant: How I exposed hacking
6 July 2011 Last updated at 17:42 BST
The actor Hugh Grant has been speaking about how he recorded a conversation between himself and Paul McMullan, in which the journalist revealed details of phone hacking by the media.
Details of the exchange were then revealed by Mr Grant in the New Statesman.
Mr McMullan, a former features editor at the News of the World, joined Mr Grant on the BBC's News Channel to debate the issue.