This article reflects selectively on the development of the legal regulation of child care practice in England and Wales since the Children Act 1948. Two main themes are identified: the burgeoning burden of the statutory responsibilities of local authorities throughout the period, and the controls more recently imposed on the discretionary exercise of statutory powers. The impact of the latter on particular areas of practice is discussed within the context of the growing influence of international treaty obligations, the concept of children's rights, and the outcomes of research on the legal framework of child care practice.