Evaluating the influence of C/t on sensitivity to relative S+ production rate.

Provides clear evidence on the feasibility of integrating a co-created communications toolkit into an existing whole-of-school programme, ultimately informing future definitive trial designs. Outlines specific refinements to data collection procedures and study design when evaluating complex, school-based interventions. Offers insight into the real-world practicalities of school-level implementation regarding barriers and facilitators while highlighting the necessity to consider context and offer intervention flexibility.