LONDON (AFP) - Prime Minister David Cameron was under renewed pressure on Thursday from Britain's phone-hacking scandal after it emerged he discussed Rupert Murdoch's failed bid for BSkyB with the mogul's executives. A day after admitting to lawmakers that he regretted hiring an ex-editor of a Murdoch paper as his media chief, the Conservative leader faced new damaging questions about his links to the tycoon's empire. Police have expanded their hacking inquiry beyond Rupert Murdoch's empire, asking for files from an earlier probe into the use of investigators by other British papers, regulators said on Thursday. The 2006 report by the Information Commissioner's Office, called "What Price Privacy Now," alleged that Britain's middle-market Daily Mail newspaper made the most requests to private investigators for confidential information. The People and the Daily Mirror tabloids, both owned by Trinity Mirror Group, were next on the list, according to the report by the office, an independent body promoting data privacy. "The information was handed over to the police three months ago," a spokesman for the Information Commissioner's Office told AFP, following a BBC report that the files had been turned over to police. "It was at their request." Murdoch, who flew out of Britain Wednesday after a turbulent 11-day visit, was forced to abandon his bid to take full control of British pay-TV giant BSkyB earlier this month as the phone-hacking scandal escalated. The scandal forced the closure of his News of the World tabloid and a string of arrests and resignations. After Cameron admitted in a stormy session of parliament that he did talk to Murdoch executives over the BSkyB deal, Deputy Prime Minister Nick Clegg was forced to defend him on Thursday. "He has been very categorical that no inappropriate discussions took place," Clegg told reporters at a London press conference.