Table 3. Overview of themes and sub-themes.

Theme	Sub-themes
Background/infrastructure of peer support services	- Service focus and scope - Professional backgrounds - Funding
Timing, location and nature of peer support	- Timing and types of support - Peer support delivery - Parent-peer matching and relationships - Integration with wider professionals
Recruitment and suitability of peer supporters	- Recruitment methods and criteria - Assessment methods
Training provision	- Availability and length of training - Training content - Training providers
Professional and emotional support	- Supervisory and mentoring provision - Access to emotional support