Princess Anne, daughter of the late Queen Elizabeth ll, has praised her mother for staying in Balmoral with a young Prince William and Harry when their mother Princess Diana died suddenly in 1997.The former Princess of Wales was just 36 years old when she was killed when the car she was travelling crashed in the Pont de l'Alma tunnel in Paris as it tried to evade paparazzi. Princess Anne said the Queen "did exactly the right thing" when she remained in the royal family's Scottish holiday residence with William, then 15 and Harry, 12, rather than returning to London immediately after Diana's death, despite facing backlash from a grieving public.The Queen's only daughter made the comments in an unseen interview from 2017 where she also praised her parents' 73 year marriage, saying that their "partnership was really important".