may be very useful for those helping with a major clean-up operation on England's third highest mountain next month.
Charity Friends of the Lake District has called for volunteers to help with its Fell Care Day on Helvellyn, which will include some people climbing to the narrow, high ridges of Striding Edge and Swirral Edge to pick litter.
Others will be involved in footpath maintenance, the repair of a sheepfold, the building of a red squirrel hide and monitoring of the numbers of the endangered creature.
Several voluntary groups are involved, including Flora of the Fells.
Its project officer Sue Manson said: "We're looking for volunteers with reasonable fitness and mobility, super fit volunteers for working a high level on steep slopes, experienced drystone wallers and people to help us make films of the day."
Standing at 3,117 ft, Helvellyn can be climbed via several routes, although the narrow ridge of Striding Edge is the most famous.
It is well known for its memorials to people who have suffered fatal falls there, including the Gough Memorial, commemorating the loyalty of a dog who stayed with the body of his master for three weeks until he was found.