Inclusion Criteria - Participants must:  Be aged 12- 17; Have witnessed domestic violence in the past; Be experiencing clinical levels of post-traumatic stress, as assessed by a member of the CAMHS team; Be on the waiting list to receive trauma-focused treatment; If 16 or over, be able to consent to take part, as assessed by a member of the CAMHS team; If under 16, have at least one person with parental authority who can consent for them. These young people will also be asked to provide their assent; Be able to communicate verbally and speak English; Have access to a device with a webcam and Internet broadband to enable participation in video sessions; Have access to a mobile device, e.g. a smartphone or a tablet. Can be the same as the device above.  Exclusion Criteria - Participants will be excluded from the study if:  They have a known diagnosis of Intellectual Disability; They have a current high level of risk including of self-harm, suicide or current exposure to domestic violence, as assessed by a member of the CAMHS team; They are substance dependent.