Events last weekend in Coire an t-Sneachda in the Northern Corries of the Cairngorms have highlighted the need for all hill-walkers and climbers to be vigilant when climbing on or passing below mountain crags. Two separate teams over the weekend were injured by rock fall. On Saturday a team on a route known as Fingers Ridge had a very lucky escape when a large slab of rock gave way. Ironically they were clearing loose rock from the route when the accident happened. And on Sunday a team were injured on Pygmy Ridge, in the same Corrie. Walkers and climbers are…