I came across this basin with what appears to be an artificial channel alongside the main track which ascends Chatton Park Hill. It is about ten yards to the left of the landrover track and about 50 yards below the summit of the hill where the main carved panel is (1a). The channel is about 2″ wide and looks distinctly man-made.
Here is a more vertical shot of the same basin and channel – with a smaller circular, or horse-shoe shaped feature on the rock below it (which may be natural).
The Flash Earth reference is (approx) Latitude: 55 deg 33′ 15.3″ Longitude: 1 deg 52′ 50.7″
What do you think? Man made channel?