Mental health liaison services have expanded nationally as part of the NHS Five Year Forward plan and will undoubtedly continue to be a pivotal in the next plan for crisis and mental-physical interface work. Liaison services work in challenging environments and demand a unique set of knowledge and skills. This one-day course is for all psychiatric liaison practitioners and for those wishing to work in this area. At the end of the course learners will be expected to have gained an understanding of the core knowledge and skill set needed to assess and manage patients’ with mental health issues in the emergency department. In addition, specialist clinical topics, areas of service development and leadership components of liaison work will be addressed.