Amy Irons is with climbing expert Duncan McCallum as they head outdoors to experience the demands of bouldering.

Solving route problems while traversing a rockface at low level might sound easy, but this sport is growing in popularity. Without the use of ropes, and relying purely on strength and flexibility, this discipline is a real challenge. Bouldering at coastal locations along the Solway Firth provides the perfect backdrop to some intense challenges.