There has been a significant increase in crack cocaine use in England over the past 4-5 years. The needs of people who inject drugs who present in police custody are not currently met by the system of care. Police custody could provide an opportunity to accelerate access to a range of services. Devon and Cornwall Police have been commissioned by the Home Office to bring local partners together to reduce heroin and crack use and offending; identify current pathways to provide support to users and understand the drivers of the crack increase to provide recommendations for service enhancement. Devon and Cornwall Police have commissioned the evaluators to conduct a service evaluation of current provision, service user experience of provision and potential opportunities in custody and the community.