British Elite World Champions...
Just seen this list of 11 current British Elite World Triathlon Champions:
ITU World Triathlon (Men): Alistair Bownlee
ITU World Triathlon (Ladies): Helen Jenkins
ITU Under-23 World Triathlon: Matt Sharp
ITU World Sprint Triathlon (Men): Jonathan Brownlee
ITU World Duathlon: Katie Hewison
ITU Team Relay: Alistair Brownlee, Jonathan Brownlee, Helen Jenkins, Jodie Stimpson
ITU World Long Distance Triathlon: Rachel Joyce
ITU World Aquathlon: Richard Stannard
ITU Cross Triathlon World Champion: Lesley Paterson
XTERRA World Champion: Lesley Paterson
Ironman World Champion (Ladies): Chrissie Wellington
... and that doesn't include any Age Group World Champions.