It is no secret that the land was inhabited for the past ten thousand years or so. What is the shock?
Pre-ice age tools have been found a few times in the British Isles, that puts a human presence there 100K years ago. But everything wound up iced over, leading to depopulation of humans and most or all fauna.
Ancient footprints found on Welsh beach [8K old]
http://www.freerepublic.com/focus/news/1783353/posts
5000 year old footprints found on Formby beach [ UK ]
http://www.freerepublic.com/focus/chat/2641021/posts