United Kingdom. From Early Centuries, the History. Archaeologists working in Norfolk in the early 21st century discovered stone tools that suggest the presence of humans in Britain from about 800,000 to 1 million years ago. These startling discoveries underlined the extent to which archaeological research is responsible for any knowledge of Britain before the Roman conquest (begun ad 43). Britain’s ancient history is thus lacking in detail, for archaeology can rarely identify personalities, motives, or exact dates or present more than a general overview. All that is available is a picture of successive cultures and some knowledge of economic development. But even in Roman times Britain lay on the periphery of the civilized world, and Roman historians, for the most part, provide for that period only a framework into which the results of archaeological research can be fitted. Britain truly emerged into the light of history only after the Saxon settlements in the 5th century ad.