The luxury motor-yacht enjoyed by Princess Diana and her boyfriend Dodi Fayed on their final summer holiday in the South of France days before their deaths in August 1997 has sunk to the bottom of the sea. 

Cujo, once a favourite of Hollywood superstars, disappeared below the waves of the Mediterranean after hitting an unidentified object some 18 miles off Beaulieu-sur-Mer, on the French Riviera, on Saturday.