Hi T.H.!!
According to a Prehistoric Society publication (volume 62 1996)
" A chambered round cairn - of unusual type" can be found at the northern end of Stronstrey Bank, just above Black Coppice quarry.
I've not had time to go and check it out yet, but hope to in the next few weeks.
If you need any more info, get back to me.
B.T.W. If you are going back to Anglezarke, I'd be interested in your views on this :-
http://www.themodernantiquarian.com/forum/?thread=12240
RIV