Thanks to Ocifants fieldnotes I was encouraged back to the Coffin Stone, which looks like a clearly defined long barrow to me btw & then onto "The Tottington Sarsens".

To find a rather attractive duckpond / water feature lined with sarsens, looking to me distinctly modern. I was so appalled at the abuse to a potential site I couldn't bear to ask at the farm about it.

Oh and Ocifant, when you are out that way again go look for the Cossington stones, a water setting like Tottington. Its in someone elses backyard as far as I could tell (TQ600747), I didn't see the site but I did see a beautiful view across The Countless Stones over medway...