To address longstanding workforce shortages, increase efficiency and control the costs associated with the modern health-care provision, there has been a worldwide policy to promote increased flexibility within the health-care workforce. This is being done primarily by extending the ‘scope of practice’ of existing occupational roles into what is referred to as ‘advanced’ practice. The development of the advanced practice nurse (APN) has occurred within the context of a shortage of medical staff, and the need to control cost. However, the (...) means by which substantially repurposed occupational groups such as these, are incorporated into complex, hierarchical organisations such as the UK national health service (NHS) remains poorly understood. Using modern sociological theory, the development of the APN role has been examined in terms of power, control, professional identity and gender relations. Each of the theoretical approaches used adds to the quality of the discussion, although none provide a comprehensive picture. However, when synthesised, they do provide an enhanced insight into the evolution of the role. It is argued here that by critically examining the development of the APN role, this will enable both a better understanding of, and the means to influence, its future direction of travel. (shrink)