The desirability of having a general duty to give reasons for court decisions has been much debated in Commonwealth jurisdictions. In England, a series of recent cases has consistently upheld the duty, albeit with qualifications. The existence of this general duty is defensible in principle. However, exactly what is required to comply with the duty is not clear. The explanation the judge is expected to give may be analysed in terms of its structure, contents and standard. These aspects are dependent on many factors, such as the rationale underlying the duty, the limitations faced by the judicial system, the nature of the decision- making process, and the significance of the decision. While one can identify the major considerations that operate at a general level, the scope and extent of the duty to explain a particular decision are dependent on the circumstances of the case. This variability makes it difficult to be certain as to when a breach of the duty has occurred. The duty must meet the purposes for which it is imposed and at the same time must not be too unrealistic in its demands.