Staff characteristics
We interviewed 18 intervention-delivery staff; nurse facilitators n=10, lay facilitators n=6 and other healthcare professional (HCP) facilitators n=2. Four (one nurse, three lay) did not respond. Identifier prefixes after each quotation are N for nurses, L for lay and H for HCPs.We have presented the four themes from the staff interviews: (1) acceptability and training, (2) running the group sessions (venues, facilitators and group dynamics), (3) factors affecting readiness to change across group sessions and (4) one-to-one sessions.