20 October 2011 Last updated at 06:29

London 2012: Five-time Olympic champion Ian Thorpe on his return

Ahead of one of the most eagerly anticipated comebacks in Olympic history, five-time Games gold medallist Ian Thorpe gives BBC Sport's Nick Hope  exclusive access to his secret training base in Switzerland.

Thorpe reveals that seeing the London Aquatics Centre inspired his return to swimming after five years away from the sport.