As the war against Isis intensifies and Syrian troops retake Palmyra, here in the UK the battle to stop the terrorist group cashing in on looted antiquities is being waged on the streets of the capital and beyond. Dispatches investigates how easy it is for terrorists to exploit this trade. Investigative journalist Simon Cox has been tracking the antiquities business in Britain for the last eight months. Together with a group of leading archaeologists, Cox has gone undercover to investigate this lucrative business and test the rules designed to regulate it. He finds a world of dubious provenance and questionable deals in the heart of London and on the Internet. He also looks at what Isis is doing to World Heritage Sites in territory it holds. How much are the two be linked? Cox examines how much of what is looted might be being sold in the UK, and what the authorities are doing to stop it.