The late Princess Diana leaked a royal phone directory to the now defunct News of the World tabloid, its former royal editor told Britain's phone-hacking trial on Thursday.Clive Goodman said that Diana sent him the contacts book by post in 1992, the year she separated from her husband Prince Charles, the heir to the throne. "She was going through a very, very difficult time," Goodman told London's Old Bailey court, where he is on trial for paying public officials for royal directories.