 With other cavers he made the first exploration of the passages below the mighty 'Solo' sinkhole in the Mulu mountains of Borneo, and also made the first ascent of the north side of Mount Kuli.He co-presented "Springwatch Trackers" (BBC Two) with Kirsten O'Brien which was broadcast live from the "Springwatch" farm in Devon between 28 May and 15 June 2007.Teams of boys and girls were set a series of Tracker challenges.