'Don't eat the brown acid'

Drug adulteration is a serious problem, although it also intersects with decades-old legends of 'bad acid'

A few days before the Parklife Festival in Manchester last month, the UK Home Office revoked the licence of on-site drug testing facilities. In a move widely criticised by commentators and music industry insiders, The Loop - the drug testing charity - was ordered to seek a “new licence” in a bureaucratic procedure that ordinarily takes several months. I…