The DrugScope annual snapshot survey of the UK drug scene was conducted in December 2014, and involved police, drug action teams and frontline drug workers in 17 towns and cities across the UK. In the majority of areas we spoke to, the street level purity of cocaine, ecstasy and heroin had gone up significantly, following several years of high adulteration across the board. Experts suggest the hike in quality is down to two interlinking factors: falling wholesale drug prices that have enabled Class A suppliers to improve their product in the face of competition from cheap yet potent new psychoactive substances.