Andy Coulson, former News of the World newspaper editor and Prime Minister David Cameron's director of communications, leaves the High Court in Glasgow, Scotland December 9, 2010. Coulson gave evidence in the trial involving former Scottish politician Tommy Sheridan and his wife Gail, both of whom deny committing perjury during a successful defamation action against the News of the World in 2006, local media reported. REUTERS/David Moir (BRITAIN - Tags: CRIME LAW POLITICS)