Gayle Hann worked as a research psychologist for Cornwall Alcohol and Drugs Agency after graduating from the University of Plymouth. She spent many years working in orphanages in Romania. She retrained as a doctor at the University of Sheffield, graduating in 2002. She is a member of the Royal College of Paediatrics and Child Health. She has been a consultant at the North Middlesex University Hospital since 2013 and is the named doctor for child protection and the lead for paediatric emergency medicine. In addition to her paediatric workload she is a senior lecturer at University College London.