This report details the findings of a two-year study undertaken by a national collaboration of universities funded through the National Institute for Health and Care Research (NIHR) National Priorities Programme for Adult Social Care and Social Work. It builds on insights from previous studies about the importance of co-production, culture, leadership, and use of data in the implementation of strengths-based approaches. The study team were guided by lived experience and practitioner groups. Research included: studying CLS programme documents and materials, interviews with local leaders and practitioners, observation of local and national CLS activities, analysing activity and finance data to understand the impact of CLS Engagement with the NDTi team