Study design and participants
PTSD, Depression, Anxiety
We did a single-blind randomised controlled superiority trial with an embedded process study in three locations in the UK (Thames Valley, London, and Sussex). Participants were mainly recruited from Improving Access to Psychological Therapies (IAPT) services in rural and urban areas (Buckinghamshire, Berkshire, Croydon, Lambeth, Lewisham, Oxfordshire, Southwark, Brighton and Hove, and East Sussex). It should be noted that in 2023, NHS England renamed IAPT as NHS Talking Therapies for Anxiety and Depression. Participants in the same areas could also self-refer in response to information listed on study and trial registration websites (ISRCTN; UK Clinical Trials Gateway).Eligibility criteria were chosen to recruit people with a wide range of PTSD severity (The trial protocol has been published