In reply to Fat Bumbly2:
> (In reply to Toerag) Please do not leave litter on the hill.
I would suspect the vast majority will be 'waymark' 'caches' with no physical presence other that the big trig point/cross that's been put there years ago. There's not normally much to hide a cache in on top of mountains, and no-one's going to put one in a cairn as you'd have to demolish it to find it.