There is a growing conversation between a number of players in the profession of policing. Those of us working in this profession for a number of decades sometimes grow weary of such talk about a new way of doing things. But these days we believe that there is a genuine change afoot, which also brings optimism. The discussion comes with the arrival of greater democratic transparency. There is an expectation that those with authority act with fairness and respect in the line of duty. There is also an expectation that a profession acts in alignment with best practice and best outcomes. And there are mechanisms to bring transgressions and failures of professionalism to the scrutiny of the public. All of these changes need better science and information to transform the business of policing. This book takes the reader through a journey the authors have taken while working within and alongside one of the largest police services in the world. That journey is one which worked to embed an organisational approach to evidence-based practice across a variety of operational realms. These include place-based problem solving, working with vulnerable victims (in particular domestic violence, rape and mental health), cultural understanding for changing the ethos within operational units (high security, armed offi cers, neighbourhood offi cers), offender management, performance and intelligence analysis and the evaluation of many initiatives within policing and partnership working.