The Leveson Inquiry is investigating the dubious practices of the British press, such as phone-hacking, breaching the privacy of celebrities and bribing the police. It has included a number of celebs like Hugh Grant, Max Mosley and JK Rowling.
Details are here:
http://www.levesoninquiry.org.uk/
In her evidence, Heather Mills claimed that PR consultant Max Clifford had contacted her in 1999 and threatened to "destroy" her if she did not let him represent her as Paul McCartney's new girlfriend. When she turned him down, she claims that he then arranged for various people "to sell lies about me for money".
Later that same day, Clifford himself denied the accusations, stating that they were "100% untrue without any truth foundation at all" and that there was a lot that he could say about Heather Mills, but wouldn't.
Right after that statement by Clifford, Lord Justice Leveson appeared to be wondering which one of them he should charge with perjury!