Sean Conway famously broke the world record for completing 105 full iron distance triathlons in 105 days. A feat no other human on the planet has ever done. He was also the first person to swim the length of Britain, is the only person to have completed a length of Britain triathlon, has completed the world's longest triathlon of 4200 miles, and has the world record for the fastest self supported cycle across Europe navigating 1600 miles of Ukraine and Russian roads in the process. He's also cycled around the world, run a marathon in every UK national park, completed a triathlon around Wales and is the founder of the global running challenge called The 496 Challenge.