Some more information down below, Carl, my first guess was the Paviland cave, then realised it was a 'secret' location.. Went to a lecture in Bath by George Nash a few years ago, that time it was some marks in a Mendip cave he had found and its nice to see that it is the Clifton Antiquarian Society from Bristol he took to Wales.
"A research team from The Open University extracted three samples: one from the surface on which the engraving is placed and two from younger speleothem deposits which partly cover the engraving, for uranium series disequilibrium dating. Uranium series disequilibrium dating is a radiometric technique which measures the fractionation of uranium from thorium at a point in time. One sample, close to the nose of the carving gives a preliminary age of 12,572 ± 660 years which is corrected for a detrital contribution. This age needs to be confirmed by analysing further samples. The date around 12,500 years ago is remarkably similar to the date, also by the Open University team, of the other discovery of cave art within the British Isles, at Church Hole Cave, Creswell Crags."
More info here...
