Easily found, following the map, and the NW outlier at the junction tells you you’ve arrived. We pulled into the No Through Road on the left, and parked on the verge (the pull-in that Moth mentioned was gated, and very muddy).
A real mystery, this one. I scaled the ladder stile and entered the field, to find 5 stones in a parabola, suggesting an ovoid ‘circle’. And unusually, a central stone. Plus of course, the two outliers. None still standing, and the possibility that this wasn’t the original location of the stones anyway. Lots of questions and very few answers. I could get no real feeling of what was what, so had to leave somewhat unsatisfied.