ES News email The latest headlines in your inbox twice a day Monday - Friday plus breaking news updates Enter your email address Continue Please enter an email address Email address is invalid Fill out this field Email address is invalid You already have an account. Please log in Register with your social account or click here to log in I would like to receive lunchtime headlines Monday - Friday plus breaking news alerts, by email Update newsletter preferences

Londoners are flushing more cocaine down the toilet than any other Europeans, according to research.

Scientists from the European Union's drug monitoring body tested samples of sewage from more than 50 cities.

The agency said the average daily concentration of cocaine was highest in London sewage, at 737mg per 1,000 people in 2014.

Amsterdam had the second highest level, the European Monitoring Centre for Drugs and Drug Addiction said.

The smallest amount was found in Jvaskyla in Finland, where 0.2mg was found per 1,000 people.

The capital fell below Amsterdam in the list when taking into account weekend samples only.

The survey also showed London had the fourth-highest daily concentration of ecstasy, while the scientists found no traces of crystal meth.

The drug agency said waste water analysis is a "rapidly developing scientific discipline with the potential for monitoring real-time population-level trends in illicit drug use".

Additional reporting by the Press Association.