Mark is a PhD student at Newcastle University. He has a background of over 30 years’ experience within the fields of substance use, criminal justice, health behaviours, HIV/AIDS, and homelessness, with specific interests in Inclusion Health, drug use, trauma, and intersectionality. He is an accredited Motivational Interviewing practitioner and trainer, and has designed or co-designed a number of training packages including MI, and Solution Focused approaches. In tandem with professionals from DrugWatchUK he designed the Drugs Wheel substance awareness model in 2012 (www.thedrugswheel.com), and completed his MSc in Public Heath (Addictions) from Liverpool John Moores in 2019. Twitter: @markadleyR.