The MCofS Mountain Safety Advisor Heather Morning, warns hillwalkers and climbers visiting the summit of Ben Nevis to be extra vigilant. The three cairns which mark the change in bearing around the top of Gardyloo Gully are now virtually buried in snow. Careful attention should be paid to judging distance by pacing and walking on a bearing in poor visibility to descend off the summit plateau safely. More details regarding navigating on the summit plateau of Ben Nevis can be viewed at www.mcofs.org.uk/ben-nevis-navigation.asp