The NHS introduced Social Prescribing to reach people before they get sick. In reality, it remains blocked by a medical gate. Working with Brent Council's pilot team, this research-based project investigated why that gap persisted and who inside the system already had the power to close it. Grounded in Transition Design, applying Theory of Change and backcasting to map the shifts needed to move from a reactive to a proactive, community-embedded model. The outcome is two interconnected interventions: a strategic transformation roadmap and a tested frontline toolkit. designed to create change at both the system level and the ground level.