This document provides an overview of prehistoric England before the Roman invasion in AD 43. It describes the early humans who lived in England during the Stone Age and built monuments like Stonehenge between 3000-1500 BC. During the Bronze Age from 2300-800 BC, people began making tools and weapons from bronze and metalwork became more common. The Iron Age saw the arrival of the Celts in Britain around 500 BC and the use of iron for tools and weapons instead of bronze.