| UPDATED: 00:29, Sat, Feb 20, 2021 Link copied Stonehenge: Expert says drone reveals 'hidden features' Sign up to receive our rundown of the day's top stories direct to your inbox SUBSCRIBE Invalid email When you subscribe we will use the information you provide to send you these newsletters. Sometimes they'll include recommendations for other related newsletters or services we offer. Our Privacy Notice explains more about how we use your data, and your rights. You can unsubscribe at any time. Experts put forward a new theory on the ancient stone structure during BBC Two's 'Stonehenge: The Lost Circle Revealed’ documentary. Researchers now believe a dismantled stone circle at Waun Mawn, in the Preseli Hills of West Wales, is likely to have been used as the foundation for the site that stands in Salisbury, Wiltshire, today. Excavations and analysis of the area led by Professor Mike Parker Pearson of University College London dated the stone circle to around 3400BC and found several similarities between both sites.