Don't go there! Trail magazine's February issue is definitely not a cut-out-and-keep, unless you're suicidal. Its directions for getting off the top of Ben Nevis in a whiteout are wrong. Guy Procter, the editor, says that the error was introduced during the production process: "Somewhere in the journey to press, our route on Ben Nevis has lost the first of two bearings needed to get off the summit safely." Instead, it would walk you into a gully down the North Face.
Happily the MCofS has a map with the correct bearings - linked below. Be careful out there!