Clarke made his triathlon debut in 2002 as an elite junior racer and has been a well-known figure in higher ranks of the sport ever since.
In 2006 he took the Under-23 ITU world title, and was selected to compete for Team GB in the 2008 Beijing Olympics. 2012 saw a move to longer distances and he won a number of Ironman 70.3 medals including silver at St. Croix, Lanzarote, South Africa, San Juan, Barcelona and Calgary, plus gold at Ironman 70.3 UK and Lanzarote.
The distances were upped again to full Ironman in 2015, and Clarke has provided three sub-8 hour performances including a 7hr45 time at the 2018 Ironman North America Championships in Texas.
Clark’s immediate race planes include the London Marathon plus a number of domestic and European events.