This article describes the history and current status of the practice of hospital-based accident and emergency (A&E) medicine in the United Kingdom of Great Britain and Northern Ireland. Included are comments on training and certification, the operations of the typical A&E department, and developments in research and academics. Also included are the authors' thoughts on issues of future importance to A&E medicine. As transatlantic links at all levels become increasingly common in this dynamic specialty, we clarify unfamiliar terminology and practices for international readers.