The SIMEX Series App, exercise material, how-to guides and support. SIMEX Series is the UK’s largest annual international disaster response exercise. It is an operational (live controlled) field exercise designed to establish a learning environment for players to exercise disaster event response plans, policies and procedures. Player participation comprises of; activate, mobilise, respond operationally on scene, report (internally and externally), implement short and medium-term plans, hand-over, demobilise and complete after-action reviews.