Since April 2023 YAS has implemented three Mental Health Response Vehicles (MHRVs) across the Yorkshire region. This has resulted in a number of key benefits to YAS and also system wide including patient avoidance to Emergency Departments. Instead of taking patients to ED, patients are taken to an alternative location, such as a safe space. In this research project, co-funded by YAS, we will use routine data to explore the impact of the MHRVs on attendances for mental health emergencies at hospitals in the area.