Professor Mark Bellis is the Director of Policy, Research and International Development for Public Health Wales, Chair of the World Health Organisation (WHO) Centre for violence prevention and alcohol lead for the UK Faculty of Public Health. Mark has undertaken substantive work in the field of violence prevention, alcohol, drugs and sexual health. He has published over 160 academic papers and more than 200 applied public health reports. Professor Bellis is the UK Focal Point to the WHO for Violence and Injury Prevention, an expert advisor to the Home Office, academic advisor to Public Health England and a member of the WHO global expert advisory panel on violence prevention. Mark has led and co developed multiple Adverse Childhood Experience studies in the UK and across Europe in order to better understand the impact of the childhood stressors on health across the life course.