The core reform of the British National Health Service (NHS) was the establishment of a quasi market with a split between purchasers and providers. Health authorities and general practitioner (GP) fundholders were to be discriminating purchasers seeking more efficient and responsive services. This market orientation was embedded in a larger context of managerial, allocational, public health, and primary care changes. This paper reviews the background and dynamics of these modifications and offers an early assessment. There is evidence that the reforms have unleashed much energy, activity, and thoughtfulness about future health care, but it remains unclear whether the gains justify the increased administrative and other transaction costs and potential threats to equal access.