In the last two decades there have been a number of social, medical and legal initiatives in the UK and elsewhere to provide assistance to women who suffer violence from their partner. The most recent innovations focus on responding to the men who perpetrate this violence. In this article we present the initial results of the first British study of programmes for violent men. The three-year study used a longitudinal method to compare the effects of two court mandated programmes with other, more orthodox, forms of criminal justice intervention (fines, admonishment, traditional probation, prison). Here we describe the men's programmes, locate the current study in the context of existing evaluations of similar programmes operating in North America, outline the methods employed, present the results of the post-hoc matching used to assess the probable effects of selection bias and using subsequent prosecutions and the accounts of women, compare the impact of different criminal justice interventions. The results indicate that twelve months after the criminal justice intervention a significant proportion of the Programme men had not subsequently been violent to their partner. This was in contrast to men sanctioned in other ways (the Other CJ group) who were much less likely to have changed their violent behaviour.