Sorry James you are wrong. Mountaineering is one of my things. The emergency shelter on Ben Nevis's summit is aproximatley 3 metres above the rocky plateau. The snow gets that deep in winter that you walk straight in at snow level. I have been on the summit 7 times in mid summer and only once has there been no snow in the top of Guardaloo Gully. Also there are many summits, Munro's included in the same area. Carn Mor Dearg is less than a mile away and those 'Mammores' just across Glen Nevis are all 3,000 footers.
Dave