Dr Katie Newby is Associate Professor in Health Behaviour Change at the University of Hertfordshire. She is a Co-Investigator, leading on the Welsh National Exercise Referral Scheme (NERS) Evaluation, at PHIRST Connect. Her research focus is on the development and evaluation of complex health behaviour change interventions. She has worked on a diverse range of public health projects focussing on, for example, sexual health, vaccination uptake, smoking, and physical activity. Her key areas of expertise include: Interventions to change health-related behaviour; Digital technology and methods; co-design; risk appraisal; sexually transmitted infections and sexual behaviour.