Eimear Cook, the ex-wife of golfing star Colin Montgomerie was accused of repeatedly lying under oath about a lunch with Rebekah Brooks in which she claimed the former News International chief excutive had told her how easy it was to hack phones. In a tense and prolonged exchange at the Old Bailey on Monday, counsel for Brooks said Cook had fabricated parts of her witness statement to the police, including a claim that the former publishing boss had told her about an assault on her ex-husband Ross Kemp.