1.2 VIAWG: Underreporting and Precursor Behaviours. What factors influence whether victims of railway‑related VIAWG choose to report incidents, or not report at all? At what points do victims disengage from reporting, investigation or safeguarding processes, and what drives that attrition? How do barriers to reporting and retention vary by offence type, victim characteristics and railway context? What are the predatory behaviours seen on the railway that precede VIAWG/RASSO?