We know that there are differences in outcomes between populations that cannot be explained by the dictates of evidence-based medicine or by demographics. Core to the work of NHS RightCare is the concept of unwarranted variation and the vital importance of using our shared NHS resources to deliver the best outcomes for our population. In 2018, NHS RightCare developed the toolkit for physical ill health and cardiovascular disease (CVD) prevention in people with severe mental illness (SMI), in close collaboration with Public Health England (PHE).