tombraider, if you have a chance to go near the Barley Mow at Tyttenhanger again, take a look just behind the green fence that's straight ahead in this Street View shot: https://goo.gl/maps/vuEr7Qyu73B2 It's suspiciously sharp-edged, but it might just be the puddingstone, you never know.
Something is not right. This message is just to keep things from messing up down the road