Dr Adam R Winstock MRCP MRCPsych FAChAM MD is a Consultant Addiction Psychiatrist at the South London and Maudsley NHS Trust and Honorary Senior Lecturer at the Institute of Psychiatry, Kings College London. He is also founder and director of Global Drug Survey, which runs the world's biggest annual survey of drug use trends; and is the architect of the online and smart phone apps the drugs meter and drinksmeter, and creator of the free online harm reduction guide, the Global Drug Survey Highway Code.