The news of the fatality was issued yesterday by the Directors of the World Cruising Club as the bulk of the 235 fleet were finishing the 2700 mile race in St.Lucia.
Thompson, a lawyer from Bangor, Northern Ireland, sustained serious head injuries when he struck his head on a winch in rough seas on Friday 7 December 2007.
The Maritime Rescue Control Centre (MRCC) in Martinique diverted a cruise ship, the Costa Mediterranea, to attend the scene and at first light on Saturday 8 December John was transferred onto the ship. His son Daniel who had been sailing with him accompanied his father. Early on Monday morning John was transferred ashore once the ship reached Barbados, where he received immediate hospital treatment.
Regrettably, John did not recover from his serious injuries while in hospital, and died late on Thursday. His family were with him at the time.
Andrew Bishop, Managing Director of the event organisers, World Cruising Club, commented:
"We are all deeply saddened by the news of John's death in this tragic sailing accident and send our condolences and prayers to his family. Despite this being such a difficult time for them, I know that they take some comfort from the fact that John died participating in the sport he loved".
The yacht Avocet, with four remaining crew, continued on to St. Lucia.