Recordings of Princess Diana speaking candidly about her sex life with Prince Charles and her sorrow at the spectacular collapse of her marriage will be broadcast on British television on Sunday.

Diana, first wife of the heir to the British throne, died aged 36 in Paris on Aug. 31, 1997, after the limousine carrying her and lover, Dodi al-Fayed, crashed in a tunnel as it tried to escape paparazzi who were chasing them on motorbikes.

Diana was just 19 when she was betrothed to Charles in 1981, but the marriage broke down. Diana blamed Camilla Parker Bowles, Charles's lover who later became his wife, for the collapse of the marriage.