... but it got passed to someone who lived a little closer. If it’s the person I think it is, they're pretty good at geology and determining the likelihood of what 'is' and 'isn't' rock art (as much as you can).
The cupmarks are identical to the ones on this stone ( http://www.themodernantiquarian.com/post/15000 ) - which have Mr Beckensall's seal of approval. And I mean identical in the sense of 'exactly the same'. The rocks at the Knar are a very soft sandstone - mother of coal - and the seashore rock is a very dense grit but the marks themselves are indistinguishable. Which, as I say, calls into question a whole load of other results.