The integration of care and education across pre-school sectors of several European countries is currently a key policy priority. In England this necessitates reform aimed at re-modelling a traditionally hierarchical and divided workforce. Drawing on research with early years professionals, this article explores the micro-politics of reform with a focus on the extent to which workers in pre-school settings are engaging in new collaborative ways of working. In particular, the transformative potential of the communities of practice model in shaping changes to the early years workforce is discussed. Findings reveal the intersection of social class as labour-market position with several cross-cutting issues and their importance in perpetuating continuing inequalities of process. These present a challenge to the emergence of any new form of collaborative inter-professional working arrangements within the English early years context.