Revealed: How much cocaine Londoners are taking every day

London's cocaine market is now worth an estimated £1bn a year after new tests revealed people in the capital are taking an average of 23kg of the Class A drug every day

More than half a million doses of cocaine, with an estimated street value of £2.75m, are being consumed in London on average each day - twice the amount of any other European city, according to a study seen exclusively by Sky News. Forensic scientists at King's College London University looked at waste water in the capital and tested for benzoylecgonine (BE), the compound produced when the body breaks down cocaine.

The tests also revealed Londoners are big weekday users of cocaine unlike other European cities.Dr Leon Barron, forensic scientist at King's College London, told Sky News that researchers found "sustained cocaine usage across the week" in the capital, with only "a slight rise at the weekend".