Quote Originally Posted by davedove View Post
Everything I've ever read says that the celts didn't get to britain until around the middle of the 1st millenium BC, which is when celtic type tools and such began to appear.

There were people in Britain for thousands of years before that. They're the ones who built the stone circles. Contrary to popular belief, the celts didn't build the stone circles; they found them, thought they were cool, and used them for their own purposes.
There is the idea that Celtic culture migrated to Britain rather than Celtic people.