Exploring long-term trends in crime and criminal justice is a multifaceted exercise. This article introduces the construction and methodological benefits of a series of new data sets that amalgamate approximately 30 years of public data on crime, victimization, fear of crime, social and political attitudes with national socio-economic indicators in England and Wales. The data operate at both an aggregate and individual level and will be available for public use (and modification) from autumn 2015. Here, we outline the contours and contents of the data set and highlight the importance of using longitudinal data in exploring theoretical and empirical questions about crime, victimization and social attitudes.