Researchers and historians have long recognised the mental health aspects of police work. In the absence of appropriate data collection, analysis and independent evaluation of policing systems, the condition of mental health and policing as an interlocked policy area and the implications of new policy initiatives and reforms remains poorly understood. It is hoped that policymakers and practitioners might use the research and insights contained in this text to ensure that new mechanisms and working practices are not developed in naïve isolation without clear appreciation of wider contextual issues. A lack of training on mental health awareness, identification, risk, partnership work and mental health first aid, left police officers in each of the jurisdictions lacking confidence in their interactions with vulnerable people. Traumatic experiences, such as responding to murders and child deaths, and being subjected to protracted misconduct investigations can have a significant impact on mental health.