Transitioning to food systems that are equitable, resilient, healthy and environmentally sustainable will require the cultivation and diffusion of transformational sociotechnical innovations—and grassroots movements are an essential source of such innovations. Within the literature on strategic niche management, government-provided ‘protected spaces’ where niche innovations can develop without facing the pressures of the market is an essential part of sustainability transitions. However, because of their desire to transform rather than transition food systems, grassroots movements often struggle to acquire such protected spaces and so must determine how and where to generate change whilst being marginalised and exposed to unprotected spaces. The aim of this research is to gain a precise view of the multiple touchpoints of marginalisation that exist across the grassroots-government interface and to apply a new framework for conceptual analysis of these touchpoints that can help to identify where and how grassroots movements might be able to push against this marginalisation. The study finds that, by applying a ‘who, what, where’ framework of analysis to policies across this interface, it is possible to find pathways forward for achieving small wins towards food systems transformation.