Gower cave reindeer carving is Britain's oldest rock art

"A reindeer engraved on the wall of a cave in south Wales has been confirmed as the oldest known rock art in Britain.

The image in Cathole Cave on Gower, south Wales was created at least 14,000 years ago, said Bristol University."

http://www.bbc.co.uk/news/uk-wales-south-west-wales-18648683