Rob Ralston1,2, Katherine Smith2,3,4, Clementine Hill O'Connor2,4, Ally Brown2,4. 1. Global Health Policy Unit, University of Edinburgh, Edinburgh, UK rob.ralston@ed.ac.uk. 2. School of Social Work and Social Policy, University of Strathclyde, Glasgow, UK. 3. SPECTRUM Consortium (Shaping Public Health Policies to Reduce Inequalities and Harm), Edinburgh. 4. SIPHER (System-science Informed Public Health and Health Economic Research), Glasgow.