Suicide is one of the most serious adverse outcomes in mental health services. NCISH research is based on a comprehensive and internationally unique database (120,000 suicide deaths; 30,000 patient suicide deaths). NCISH impacts upon practice and policy by providing definitive figures on suicide to clinical services and government, producing data-driven safety recommendations and demonstrating that these recommendations reduce suicide. Based on NCISH research, overall patient suicide rates fell by 26% (2004-11), in-patient deaths fell by 58% (2001-2010), and individual recommendations may have prevented between 200-300 patient suicide deaths per year. A new vehicle for impact delivery is the social enterprise Safer Care Ltd (founded 2013), which has already reviewed 4 Trusts and, by reinvesting future income in the social enterprise, we will continue to meet the specific needs of mental health services.