...so the individual stones at Arbour Low are recumbent, but the circle (probably) isn't.

:-)#

You could call it a circle of recumbent stones, but not a recumbent stone circle.

Kammer x

You're right, my use of the word is not really what the proper definition of a recumbent stone circle is! Does that mean there aren't (m)any other sites where every single stone is lying down - and that means such a layout is probably not an Original design?