Helen Skelton

Helen made her name as the daredevil Blue Peter presenter. During her five and a half years on the show, she took on challenges including kayaking 2010 miles down the Amazon in support of Sport Relief, a spectacular 150 metre high-wire walk between the towers of Battersea power station for Comic Relief, and a record-breaking 500-mile journey across Antarctica to the South Pole by ski, kite and bike.