< the weather didn't help either as it was chucking down and visibilty wasn't great - still the moor was really atmospheric >
Sometimes I find that can be the best time to visit them!
< I believe there are 4 circles on the moor - is this true? >
Aye. Sadly the one at Bradup was recently destroyed:
http://www.themodernantiquarian.com/site/2194
But we've still got remains of the Roms Law or Grubstones circle:
http://www.themodernantiquarian.com/site/2720
The messed-up site of Backstones, which it seems only the eastern edge is part of the original (and not far from Cow&Calf):
http://www.themodernantiquarian.com/site/2733
And the very curious Horncliffe circle:
http://www.themodernantiquarian.com/site/2721
But for position and views, Apostles seems the best.