Two British cities have the highest levels of cocaine detected in sewage in all of Europe, according to an alarming new study. New multi-city data from the European Union Drugs Agency shows that Middlesbrough leads the continent for both weekday and weekend levels, with Bristol coming in second. Bristol - where issues have long been reported with ketamine use due to its high student population and lively party scene - is also number one in Europe for amounts of the horse tranquiliser found in