Andy Akinwolere swam 8.6 km over the 8,000m Palau Trench after learning how to swim 10 weeks previously in June 2011.

Courtesy of WOWSA, Huntington Beach, California. Andy Akinwolere, the presenter of Blue Peter, the world’s longest-running children’s television show, is heading to the ocean deep. In June, Akinwolere will attempt to became the first person to complete an open water swim across the surface of Challenger Deep, the deepest stretch of ocean on Earth, as