Ha!!.........I've seen 'em!!

:o)

Well, those images discovered earlier, including the bird in bas-relief depicted in the photo which accompanies the Guardian and BBC articles.

http://www.themodernantiquarian.com/post/26846

My visit to Church Hole Cave ranks amongst the best experiences I'm ever likely to have at an ancient site. I do hope we'll get another chance to see the cave art. Unfortunately, I think it's unlikely.