I think that science thought that "early humans" didn't live in the British Isles. Here's a story that ends that thought. Apparently, way back when, they weren't islands, and that's how animals (& early humans) got there. It was a bit far north, but it seems that they moved during a "warm period" in earth's history.
from SciTech Daily:
Early humans were living in Britain around 200,000 years earlier than thought [the story]