Trudie Chalder, PhD, MSc, SRN, RMN, is a Professor of Cognitive Behavioural Psychotherapy at King’s College London and South London and Maudsley NHS Trust. She has worked as a clinician and a researcher around the area of persistent symptoms for over 35 years. She develops specific cognitive behavioural models for understanding and treating symptoms and associated disability. She evaluates the approaches within the context of randomised controlled trials in primary and secondary care. Her research involves investigating not only whether treatment works but how and for whom. Her work spans adolescents and adults. Since the start of the pandemic, she has been involved in multi-disciplinary research and clinical approaches to post-COVID conditions. Trudie has published around 400 articles. She was the President of the British Association of Behavioural and Cognitive Psychotherapy (BABCP) and is an honorary Fellow of the BABCP.