Well smart, most unusual and interesting.

>In PRAoWR, B&V quite rightly refer to it as a mini 'Tree of Life' rock
I reckon it's also quite like a more complex version of the 'TV set' Beckensall recorded at Amerside Law in Northumberland.

I never fails to amaze me how such a limited repetoire of elements can be recombined to produce so many different motifs.