This article in the series describes how UK law and medical ethics have evolved to accommodate developments in organ transplantation surgery. August committees have formulated definitions of the point of death of the person which are compatible with the lawful procurement of functioning vital organs from cadavers. Some of the complexities of dead donor rules are examined. Live donors are a major source of kidneys and the laws that protect them are considered. Financial inducements and other incentives to donate erode the noble concept of altruism, but should they be unlawful?