A WARRINGTON schoolteacher will be tackling one of the most gruelling sporting challenges on the planet this summer.

Rob Wilby, a teacher at St Gregory's High School, will be taking on the Ironman UK Triathlon when it comes to Bolton on August 2.

He will be among around 1,500 professional and amateur athletes from 35 countries competing for one of 30 qualifying slots for the Ironman World Championships in Hawaii in October.

The challenge involves a 2.4-mile swim in Rivington Reservoir, followed by a 112-mile bike ride and finally a full marathon (a 26.5-mile run). Athletes have 17 hours to complete the 140.6 mile race.