Halksworth, the sport’s development officer, set an impressive time of 1 hr 54 min 58 sec for the Olympic course discipline of a 1,500m swim, a 40 km cycle and 10 km run.

Forbes, competing in her first season of triathlon, finished in 2.25.02.

They and the others in a record field plunged into the sea at Bel Royal at 7.30 am, before completing the bike ride and run.

• Full report and more pictures in Tuesday’s Jersey Evening Post