The world’s most stupid navigational error

After a promising start to the day, the clouds moved in and the rain started pounding against them as they ascended the south ridge of Stob Choire Claurigh, the highest point in the Grey Corries, a ridge of quartz-laden peaks due east of Ben Nevis. Four of the peaks are Munros, a defined list of Scottish mountains over 3,000ft in height.

‘That was a beast of a mountain,’ the idiot said to Edita as they crested the final rise and spied the pile of rubble that marked the summit.

They were standing...