 When returning from a night shoot on one of the Caribbean islands,  Keira Knightley (qv)s boat struck a reef and went down. The only  people aboard were Knightley, her mother and the boats skipper, all  of whom escaped unharmed and were rescued within a few hours.  However, the incident ultimately determined that the rest of the  island night shoots needed would complete filming in a studio,  rather than on location.