Walking in the United Kingdom the scrambling suddenly becomes much more serious. In Britain, the term "mountaineering" tends to be reserved for technical climbing on mountains, or for serious domestic hillwalking, especially in winter, with additional equipment such as ice axe and crampons, or for routes requiring rock-climbing skills and a rope, such as the traverse of the Cuillin ridge, on the Scottish island of Skye. The British Mountaineering Council provides more information on this topic. Navigation and map-reading are essential hillwalking skills on high ground and mountains, due to the variability of British and Irish weather and the risk of rain, low cloud, fog
Scottish island names Shetland, and Kirk Rocks in Orkney. Great Cumbrae and Little Cumbrae are English/Brythonic in derivation and there are other examples of the use of "great" and "little" such as Great Bernera and Rysa Little which are English/Gaelic and Norse/English respectively. The informal use of "Isle of" is commonplace, although only the Isle of Ewe, the Isle of May and Isle Martin of the larger Scottish islands use this nomenclature in a formal sense. "Island" also occurs, as in Island Macaskin and Mealista Island although both islands are also known by their Gaelic names of "Eilean Macaskin" and "Eilean Mhealasta". Holy