Triathlon is one of the fastest growing participation sports in the UK and for the first time in its Olympic history, Team GB have a realistic chance of, not one, but two medals at London 2012.

Alistair Brownlee and his brother Jonny are the men to beat in the world triathlon series and they are hoping for Olympic glory. With a year to go to the London Games, the BBC's Kieran Fox went to meet them at a high-altitude training camp in St Moritz, Switzerland.