Residents have been left furious after an unauthorised encampment containing multiple caravans returned to a protected archaeological site.The ancient location in Newbridge, Huly Hill, contains a stone circle and burial cairn believed to date back approximately 4,500 years to around 2500 BC.Locals from Newbridge and Ratho Station said that despite the site's protected designation, it has become a repeated target for illegal camps.The Newbridge a…