More than a thousand heroin addicts are expected to die of overdoses in Europe this year. Many more will suffer from secondary effects. According to Interpol, tons of heroin are seized annually and the quantity is rising sharply. What characters run this multi-million pound business, who controls them, and where does the money come from? Does Britain have a heroin problem yet, and will we be the traffickers' next target?
Jon Swain investigates the heroin trail in Europe and follows the routes that may eventually lead to Britain. Producer MICHAEL GRAVES