A walker (f,40) was reported by a fellow walker to be unable to walk further, having nearly completed the 3 Peaks Challenge. A CRO vehicle with 2 team members went to the location given at Sulber Nick crossroads, and found the walker to be tired and with extremely painful knees. As the casualty was being put in the vehicle, a second walker (m,48) was found nearby, who was similarly incapacitated. As…