Hundreds of British and Irish nationals are in lockdown on a cruise after a passenger died in a suspected norovirus outbreak . More than 1,700 passengers and crew are being held on the French cruise ship docked in Bordeaux , southwest France, as a precautionary measure after dozens of possible cases were identified on the vessel. A 92-year-old passenger has died, and about 50 people had shown symptoms of the virus, according to French health officials. The operator, Ambassador Cruise Line, said the cause of death of the passenger is yet to be established, pending a coroner’s full report. The 14-night cruise, which departed Belfast on Friday and Liverpool on Saturday before arriving in Bordeaux on Tuesday, where it has now been held, is unable to move until the outcome of medical tests is known.…