Camilla, Duchess of Cornwall sympathised with Princess Diana as she struggled to cope with Prince Charles' strict routine, a new book has claimed.
Royal biographer Tina Brown claims that usually "upbeat" Camilla found life within the British royal family difficult after she married Charles in 2005.
In an extract from her book The Palace Papers: Inside the House of Windsor - The Truth and Turmoil published in the Daily Telegraph, Brown wrote: "The ambivalence of her position was becoming untenable. For a while, she had thought there was an upside to not being Charles' wife.
"She had always hated flying, speaking in public, dressing up and getting press attention. She had never had a calendar filled with things she didn't want to do, which essentially defines the royal way of life."