The former chief executive of the publisher of the Daily Mirror has said she was unaware of the phone-hacking carried out by reporters she employed, as she gave evidence in a lawsuit brought by Prince Harry against the newspaper group. Sly Bailey - chief executive between 2003 and 2012 of Trinity Mirror, publisher of the Daily Mirror, Sunday Mirror and Sunday People - told the High Court that allegations of unlawful information-gathering were "a matter of great regret".