Finally got around to taking some photos of the site, had to wait until winter as it's obscured by undergrowth in summer. It is a slight hillfort and is best seen from the valley below, I have walked up it but didn't today as it was far too muddy.
A small, little known univallate hillfort, the only real mention of this site on the whole web is a reference to it by Thomas Hardy in Tess of the D'Urbevilles.