I found

After searching before for these, The Louden Wood Stone Circle, we finally found them.
There is a sign beside the White Cow Wood car park pointing up to Louden Wood and the stones.
Except they aren’t there, they are about half a mile back down the wood and up another track. This one unsigned.
We had to use Google Maps to find them. And they are off the track and in the woods in a clearing with no path leading to them.

And not in Louden Woods but in Derr Forest.