An electric fence was installed to 'heaf' the new stock of sheep into the Duddon Valley following on from Foot and Mouth disease. This runs from Three Shires Stone, to Cold Pike and then on to Crinkle Crags. It then runs down over Adam-a-Cove, Black Crag and the down to Hardknott Summit. There is also a spur that runs up from Gaitsgill up one side of Little Stand, round and down again.
This is generating a magnetic field which affects compasses in a seemingly random way, making them unreliable in an area already notorious for people becoming lost.