This report has been prepared by researchers from the University of Sheffield for built environment, water, and public health professionals in the UK. It collates and presents evidence about the potential benefits of designing Blue Green Infrastructure (BGI) to enhance mental health, physical health, and wellbeing. We hope it will help professionals to advocate for health-promoting BGI to policymakers; to integrate health-promoting BGI into policy, investment, and master-planning; and to design BGI in a way that maximises health benefits. The report identifies three key attributes of BGI that provide health-relevant environmental impacts. Firstly, BGI can be used to promote a healthy physical environment: to diminish noise, reduce heat stress, and improve air quality. Secondly, BGI has beneficial...