Inclusion Criteria:  Is currently receiving care under an NHS Community Mental Health Team, and meets ICD-10 or ICD-11 criteria for a schizophrenia-spectrum diagnosis (schizophrenia, schizophreniform disorder, schizoaffective disorder, delusional disorder or psychotic disorder not otherwise specified) indicated by case notes, or under the care of an Early Intervention in Psychosis Service Aged 16 or above Medication stable for ≥ one month, as indicated by their Care Coordinator Has capacity to give written, informed consent Proficient in English to complete study questionnaires A score of one or more on the four psychosis-related trauma items (items 15 to 18) on the Trauma and Life Events Checklist (Carr et al., 2018b)  Exclusion Criteria:  Has an acquired brain injury Has a history of substance misuse that is judged to be the acute cause of the psychotic experiences Currently experiencing an acute episode requiring inpatient care Currently undertaking psychological therapy