The event is now in its 38th year and is undoubtedly the most iconic one-day endurance event in the world. Great Britain has 124 athletes competing this weekend.

This time round, the largest international athlete field in Ironman history will toe the line, representing 64 countries and six continents. Athletes aged between 19 and 83 have earned their championship opportunity by finishing among the best at one of more than 40 qualifying Ironman events worldwide.