section_path: Europe/West Europe/Great Britain
section_name: Great Britain
paragraph_text: Great Britain
  
  In Great Britain, the Bronze Age is considered to have been the period from around 2100 to 750 BC. Migration brought new people to the islands from the continent. Tooth enamel isotope research on bodies found in early Bronze Age graves around Stonehenge indicates that at least some of the migrants came from the area of modern Switzerland. Another example site is Must Farm near Whittlesey, host to the most complete Bronze Age wheel ever to be found. The Beaker culture displayed different behaviours from earlier Neolithic people, and cultural change was significant. Integration is thought to have been peaceful, as many of the early henge sites were seemingly adopted by the newcomers. The rich Wessex culture developed in southern Britain at this time. Additionally, the climate was deteriorating; where once the weather was warm and dry it became much wetter as the Bronze Age continued, forcing the population away from easily defended sites in the hills and into the fertile valleys. Large livestock farms developed in the lowlands and appear to have contributed to economic growth and inspired increasing forest clearances. The Deverel-Rimbury culture began to emerge in the second half of the Middle Bronze Age (c. 1400–1100 BC) to exploit these conditions. Devon and Cornwall were major sources of tin for much of western Europe and copper was extracted from sites such as the Great Orme mine in northern Wales. Social groups appear to have been tribal but with growing complexity and hierarchies becoming apparent.
  
  The burials, which until this period had usually been communal, became more individual. For example, whereas in the Neolithic a large chambered cairn or long barrow housed the dead, Early Bronze Age people buried their dead in individual barrows (commonly known and marked on modern British Ordnance Survey maps as tumuli), or sometimes in cists covered with cairns.
  
  The greatest quantities of bronze objects in England were discovered in East Cambridgeshire, with the most important finds recovered in Isleham (more than 6500 pieces). Alloying of copper with zinc or tin to make brass or bronze was practised soon after the discovery of copper itself. One copper mine at Great Orme in North Wales, reached a depth of 70 metres. At Alderley Edge in Cheshire, carbon dating has established mining at around 2280 to 1890 BC (95% probability). The earliest identified metalworking site (Sigwells, Somerset) came much later, dated by globular urn-style pottery to approximately the 12th century BC. The identifiable sherds from over 500 mould fragments included a perfect fit of the hilt of a sword in the Wilburton style held in Somerset County Museum.