Brandon Langley, PhD., Institute of Criminology, University of Cambridge. Expertise in procedural justice theory, police self-legitimacy and police legitimacy. Consultant on procedural justice and police legitimacy to a number of UK police forces. Formerly a serving Detective Superintendent with over 30 years policing experience.

Barak Ariel, PhD., Professor of Experimental Criminology Institute of Criminology, University of Cambridge, and Professor of Criminology, Institute of Criminology, The Hebrew University of Jerusalem. Expertise in experimental criminology and police legitimacy. Consultant to a number of UK and police forces globally on evidence-based policing, experimental research and designs.