The summary builds on our previous work exploring interventions to reduce unplanned admissions (Aldridge and Turner, 2013) and provides an update of the literature published since 2013. In the interests of time, this review has focused on secondary research only, in the form of syntheses of evidence and systematic reviews. This helps to ensure a focus on research-based findings which have been tested and validated; however, learning from practice may offer valuable lessons, particularly on new and emerging approaches, if highly contextual.