Migrants Poured into Britain after Ice Age By John von Radowitz, Science Correspondent, PA News Britain experienced a tidal wave of immigration as soon as the last Ice Age ended, new data has shown. Previously it was thought that Britain’s repopulation was a slow process led by a few pioneering explorers. Researchers now know that humans responded rapidly to climate change and moved into Britain en masse as soon as the ice receded. Up to 20,000 years ago a huge ice sheet extended as far south as Norfolk. Then temperatures rose rapidly, producing warming weather than we have now. Once...