Intervention
telephone/video
The guided intervention session was delivered remotely by a team of two clinical psychologists and a research assistant. All had received an online training course including theoretical background, key components of the intervention and procedures for effective delivery. Training with experienced clinical researchers (MK and EH) on the intervention and the intrusive memory diary included role-play practice, discussion, and feedback on videoed sessions until staff met competency criteria. Initial participant sessions were observed in real-time by LI. A sample of later sessions were recorded to aid protocol adherence. Staff had weekly group supervision and real-time support as needed via telephone/video call with MK and EH.After randomisation the researcher contacted participants in the immediate intervention arm to arrange a first guided session with the digital intervention platform, and this was carried out after 4 weeks for the comparator arm (delayed intervention). The intervention consisted of key components integrated on a secure web-based mental health and wellbeing platform (i-spero