Britain's Queen Elizabeth II and Prince Philip were not amused by the humanitarian causes taken up by Princess Diana, such as the fight against landmines and her support for HIV/AIDS sufferers, the inquest into her death has been told, according to dpa. Simone Simmons, a complementary therapist who treated Diana and became a confidante, told the London inquest Thursday that Prince Philip had written "cruel and derogatory" letters about the "propriety of the princess' behaviour." Two "nasty" notes Prince Philip sent to Diana criticizing her conduct had left her angry, Simmons said. However, responding to questioning by the counsel for the inquest, Simmons said she believed that no member of the royal family would "ever have harmed" Diana. Like other witnesses before her, Simmons confirmed Thursday that Diana knew she was under surveillance by the security services. "When there was a click on the telephone line, she would say: 'Time to change the tape, boys,'" Simmons related. She said Diana had told her of her fears that she would one day be murdered by Britain's security services. "If something happens to me, MI5 or MI6 (the security services) will have done it," Diana allegedly said. In testimony earlier this week, a former bodyguard of Diana's said that the queen strongly disapproved of Diana's prominent role for AIDS charities. "Can't you find something more pleasant to do?" the monarch was said to have asked her then daughter-in-law in the early 1990s. However, 10 years after Diana's death, the queen for the first time shook hands with HIV/AIDS sufferers during a state visit to Uganda last November.