We live in a historic period of heightened and intersecting uncertainties. This article draws on Bauman’s () metaphor of ‘liquid modernity’ to discuss the precariousness of family lives and child and family welfare provision in the context of austerity politics in contemporary England, before going on to consider the implications for research and researchers. Contexts of constant uncertainty have ethical and methodological implications for family research, particularly for studies concerned with services for children and families. When precarisation is an instrument of government, we need approaches to understanding ‘what works’ that are fit for liquid modern times: engaging with the complex contingencies of child and family lives and of the systems and services that they encounter, and actively resisting individualising and deficit-focused narratives in the study of child and family welfare. I focus my reflections on England because it is where I live and work, but the considerations I discuss have relevance for any context where the erosion of welfare provision coincides with growing inequality for children and families.