To uncover therapeutic micro-processes from the perspectives of eating disorder (ED) treatment non-responders with childhood trauma (CT) late effects, we explored in-session experiences of poor long-term outcome patients. Female inpatients aged 28-59 (M = 40.2, SD = 5.0) from a randomised trial comparing Compassion Focused Therapy for EDs (n = 3) with Cognitive Behavioural Therapy for EDs (n = 3) were interviewed with video-assisted recall about a self-selected session. Data were analysed through Interpretative Phenomenological Analysis (IPA) with Grounded Theory (GT) elements.