[1951] AC 507 (House of Lords)
Reading v. Regem is a cornerstone case in the law of fiduciary obligations and the remedies that follow from their breach.
Whether a fiduciary/servant (an army sergeant) who obtains money by exploiting his official position and uniform, although outside the scope of his assigned duties, must account to his principal (the Crown) for those profits and can be required to disgorge them to the principal.
A fiduciary or employee must not profit from his position without the informed consent of the principal. Any benefit obtained by reason of the fiduciary relationship—i.e., by using the principal's property, authority, or position—is held for the principal, even if the principal suffers no loss and even if the profit was not made in the course of performing authorized duties. Equity will require an account of profits and may impose a constructive trust over the gains so obtained.
Yes. The Crown was entitled to the money. Because the sergeant's profits were obtained by reason of his position and through misuse of his uniform and apparent authority, he was bound to account to his principal. The money was recoverable by the Crown, and Reading could not retain it.
Reading v. Regem entrenches the disgorgement remedy for breach of fiduciary duty: if a fiduciary profits because of the position itself, the gains belong to the principal irrespective of loss. It clarifies that misuse of the symbols or incidents of office (e.g., uniform, title, access, or authority) suffices to trigger fiduciary accountability, even when the profit-making acts are outside the fiduciary's assigned tasks. The case is frequently cited alongside Regal (Hastings) v Gulliver, Boardman v Phipps, Attorney General for Hong Kong v Reid, and FHR European Ventures v Cedar Capital as foundational authority for the no-profit rule and proprietary remedies (constructive trusts) over bribes and secret commissions. For students, it exemplifies how equity polices loyalty by focusing on causation ("by reason of position") and gain-stripping rather than fault or loss.