Police involvement in inter-agency crisis mental health first response pathways in England: A realist and cost consequence analysis. PIONEER-MH.
People in mental health crisis often struggle to access timely and appropriate support, and recent changes to police involvement mean the impact on care pathways is not yet well understood. This study will evaluate how community multi-agency mental health crisis response pathways are implemented, delivered, and experienced, including their costs and outcomes for people seeking urgent support.