Judith Aldridge is Senior Lecturer in the School of Law at the University of Manchester. Her research spans aspects of drug use and drug dealing, including drug dealing within street gangs, and the sales of both illegal and legal psychostimulants. Fiona Measham is Senior Lecturer in Criminology at Lancaster University. Her research focuses on emergent drug trends, club drugs and music scenes, licensed leisure and the night time economy, and UK policy developments. She is a member of the Advisory Council on the Misuse of Drugs and the Independent Scientific Committee on Drugs. Lisa Williams is a Lecturer in Criminology at the Centre for Criminology and Criminal Justice, University of Manchester. For over a decade, she has researched both recreational and dependent drug use with a focus upon drug use across the life course.