The start lists for the London 2012 Olympic Triathlon competitions have been determined. For the men, reigning British world champion Alistair Brownlee and brother Jonathan are wearing numbers 30 and 31 respectively, while reigning ITU sprint world champion Barbara Riveros Diaz of Chile has been allocated number one for the women's race.
Tyler Butterfield has been issued racer number 6 for the Men’s Race, while Flora Duffy will wear the number 36.
Men’s Double world champion Javier Gomez, the biggest threat to the Brownlee brothers' hopes of home success, will wear number 51 for Spain.
The reigning champion, Jan Frodeno of Germany, will be sporting number 46, while Bevan Docherty, a double Olympic medallist for New Zealand, will don number 54.
Sven Riederer of Switzerland, another triathlon Olympic medallist, has been assigned number 21.
Russia's Alexander Bryukhankov could be one to keep an eye on in number 25, as will the 2000 champion, Canada's Simon Whitfield, wearing five. Tyler Butterfield, Whitfield, along with American Hunter Kemper in number 43, will be the only athletes on the men's side to have competed in every Olympic triathlon to date. Number one will be worn by Costa's Rica's Leonardo Chacon. Diaz, stands a chance of success this summer, but will be up against the likes of home favourite and reigning ITU world champion Helen Jenkins, wearing 10.
Australia's talented trio of Erin Densham, Emma Jackson and Beijing 2008 bronze medallist Emma Moffatt will wear 25, 26 and 27 respectively.
Anja Dittmer of Germany, the only woman to have competed in every Olympic Games that triathlon has been on the programme, will wear the number 22.
Other women to look out for are France's Jessica Harrison in number 12, New Zealand's Andrea Hewitt in number 32, Spain's Ainhoa Murua in 45 and Nicola Spirig wearing 43 for Switzerland, who has enjoyed a superb year to date.
Tyler Butterfield,