Abstract PHE London held six table top outbreak exercises during 2017/18/19. Aims: • To test the resilience of the secure estate and stakeholders in dealing with a communicable disease outbreak; • To highlight the threat and consequences of outbreaks within the prison/IRC establishment and the wider community; • To outline associated roles and responsibilities of stakeholders in managing outbreaks; • Share learning of ‘real' events; • To develop effective multi-agency communications, intelligence sharing and support networks; • To test current tools are fit for purpose.Attendees included Public Health England, NHS England, Prison/IRC security, Prison/IRC Health Care and Pharmacy, Home Office, Local Authority, Emergency Planning, and Acute NHS Trust.The exercises incorporated a mixture of presentations, group discussion, and scenario-based workshops. The scenarios were either gastrointestinal illness or seasonal influenza. Common themes were identified among the lessons learned: • Need for robust arrangements for reporting illness and identifying outbreaks early• Clarity needed on health messaging around exclusion and roles for sharing and delivering these messages• Competing priorities for different stakeholders in the outbreak control team• The need to have robust contingency arrangements in place e.g. for cleaning, provision of meals in the event of closure of prison kitchens• Lack of clarity about the role of Occupational Health contracted for the Prison/IRC StaffThese exercises should be held regularly to ensure that outbreaks are prepared for and managed optimally. The learning from the exercises can be used to enhance outbreak management, and ultimately, to protect detainees and staff from the potentially serious consequences of infectious disease outbreaks. External funding details