Andy, as you've said, this is a duplicate - all the content relates to the 'real' South Cairn with the Grid Ref HY50915184.
There IS a chambered cairn shown on the OS Map at HY50705184 - but there was no sign of this on the ground
The 2 comments which have been added do however need to be transferred to the proper South Cairn though, or they would disappear if the false one is simply deleted.
Something is not right. This message is just to keep things from messing up down the road