That gives me a lot more confidence that what I found could be it, my spot is ‘on the left hand side of the valley going up, a few yards above the damn of the second reservoir’, the stones are in amongst the lining stones of the reservoir and are in a circle roughly 10m in diameter. I could identify what looked to be six stones of a circle, which look much older & more eroded than the casement stones. If this is the circle it’s a miracle its survived so close to the dam. I would estimate that these stones will be under about 3m of water when the reservoir fills up.

Incidentally whilst up here I took a look at the nearby Sutcliffe’s Rough stones, two of which are over the fence in Pisser Rough, should these two get their own site – The Piss Stones perhaps?