In reply to Rob Hannah: Not surprising. I keep tabs on Ogwen MR's callouts as they're the team nearest here. Lots of them are just because people get benighted and don't carry torches, and other stupid things.
A few examples:
"The casualty had set off from Capel Curig in the early afternoon to find a good viewpoint from which to paint Llyn Crafnant. On his return he became confused in the rocky bluffs below the Crimpiau and as darkness fell he became trapped between a crag and a river. Although he could see the lights of Capel Curig he had lost the confidence to continue in the dark, so called his wife and 999. The Team spotted his torch from the roadside and quickly extricated him from his location. Tea and the warmth of Base soon revived him."
"The couple were planning to climb the North ridge of Tryfan, but had no knowledge of the route or where it started. They parked at the walled carpark and started to ascend the area under the West face. At some point they could see across to the Canon rock on the North Ridge and decided to climb a gully line to reach it. They ascended the gully which became progressively steeper and more slippery, until they could neither go up nor down. They were both in precarious positions but managed to ring 999. 22Sqn were initially operational elsewhere so NW1 were asked to assist, whilst a hill party set off on foot. NW1 were unable to reach the pair, and when 22 Sqn arrived it was decided that they would have to be moved to a better area for winching. The hill party secured the casualties and then roped them up the gully to better ground. 22 Sqn then winched the pair and flew them to Oggie Base. Both casualties felt that they would not have been able to hold on for much longer, and both realised the serious implication of a fall from their position. A very lucky pair."