On the diagram below are eight marks representing specific points on an area of the 1:50000 Ordnance Survey map which also covers the above co-ordinates. Also shown on the diagram is X, which marks the spot where the spoiler picture was taken and where the cache is placed. All you have to do is translate the X into a meaningful location, then go and find the cache!
Please do not give away in your log or by any other means how you discovered the correct location.
If you see these views then you are going in the right direction . . .
The cache is here: