Professor Mark Bellis is Honorary Professor in Public Health at Bangor University, Director of Policy, Research and Development for Public Health Wales, and Chair of the World Health Organization Collaborating Centre for Violence Prevention. Mark has undertaken substantive work in the field of violence prevention, alcohol, drugs and sexual health. He has published over 150 academic papers and more than 200 applied public health reports. He regularly works on the development on public health policy at local, national and international levels; working with the European Public Health Association, WHO and other UN organisations. As a Director in Public Health Wales, Mark leads on Policy, Research and International health issues. Professor Bellis is an expert advisor to the Home Office, alcohol lead for the UK Faculty of Public Health, academic advisor to Public Health England and a member of the WHO global expert advisory panel on violence prevention.