Yes, and it was interesting. Hes doing a symposium thing at Bristol university in April, so there should be more.. He revealed at the lecture, that there is recently discovered rock art at Aveline Cave on the Mendips, two rows of Xs with straight lines. Think roman numerals, and yes I was suspicious with the roman lead mines there, but he said that the rockart was in a closed "context". Early skeletons discovered in the 18thC is part of the sequence, can't remember more....