*I. R v Lawrence [1972] AC 626*
D, a taxi driver, took £6 from an Italian student who spoke little English for a journey worth a few shillings. The student had opened his wallet and invited D to help himself. The House of Lords held that appropriation could occur even where the owner consented to the taking. Viscount Dilhorne's speech stated that the question was whether D had assumed the rights of an owner; consent went to dishonesty, not appropriation. The decision was ambiguous, however, and lower courts continued to debate whether consent precluded appropriation.
*II. R v Morris [1984] AC 320*
D switched price labels on goods in a supermarket. The House of Lords, per Lord Roskill, held that appropriation required an "adverse interference" with or usurpation of the owner's rights; merely assuming one of the rights of an owner could suffice, but the act must be unauthorised. Lord Roskill appeared to limit Lawrence to its facts, suggesting that consent negated appropriation except in deception cases. Morris's narrow reading dominated for a decade.
*III. R v Gomez [1993] AC 442*
D, an assistant manager, persuaded his manager to accept stolen building society cheques in exchange for goods. The manager consented to the transaction. The House of Lords, overruling Morris, held that appropriation does not require absence of consent. Lord Keith approved Lawrence and held that s 3(1)'s phrase "any assumption" is unqualified; consent and authority are relevant to dishonesty, not to appropriation. The decision collapsed the distinction between theft and obtaining by deception, a point Lord Lowry made in dissent.
*IV. R v Hinks [2001] 2 AC 241*
D befriended a man of limited intelligence and received daily gifts of cash totalling some £60,000 over six months. The civil law regarded the gifts as valid (no undue influence or incapacity was proved). The House of Lords held (Lord Steyn, Lord Jauncey, Lord Hutton; Lord Hobhouse and Lord Slynn dissenting) that even an indefeasible gift could be appropriated if obtained dishonestly. The criminal law's concept of appropriation is independent of the civil law's proprietary analysis. Lord Hobhouse's dissent warned that this created intolerable overlap between criminal and civil remedies and punished "bad behaviour" rather than true theft.
*V. R v Ivey [2017] UKSC 67 and R v Barton & Booth [2020] EWCA Crim 575*
Although Ivey concerned cheating at gambling (Gambling Act 2005), the Supreme Court's analysis of dishonesty has been adopted for theft. The Court rejected the second, subjective limb of Ghosh: D's own moral views are irrelevant; the question is whether his conduct, on his understanding of the facts, would be regarded as dishonest by ordinary standards. Barton & Booth confirmed this test applies to the Theft Act 1968. The effect is to remove the defence of "Robin Hood" defendants who believe their conduct morally justified.
*VI. R v Lloyd [1985] QB 829*
D, a cinema projectionist, removed films to allow an accomplice to make pirate copies, then returned the originals. The Court of Appeal quashed the conviction: s 6(1) requires an intention to deprive the owner of the property's "goodness, virtue, or practical value." Temporary use, even if dishonest and unauthorised, is insufficient. The decision has been followed in cases involving concert tickets used and returned, though the borderline between use and exhaustion of value remains uncertain.
*VII. R v Hale (1978) 68 Cr App R 415*
D and E entered V's house; D seized a jewellery box while E tied up V. The Court of Appeal held that appropriation is a continuing act; force applied after the initial seizure but before the thieves left the scene could be "at the time of" stealing for the purposes of robbery. The principle avoids artificial distinctions about the precise moment appropriation is complete and reflects the reality of robbery as a single course of conduct.
*VIII. DPP v Gomez (on robbery) and R v Robinson [1977] Crim LR 173*
In Robinson, D, owed money, threatened V with a knife and took cash. The Court of Appeal held that if D genuinely believed he had a legal right to the money, he lacked dishonesty and therefore could not commit theft or robbery, even if his means of recovery were criminal (assault). This principle, rooted in s 2(1)(a), remains good law but is narrowly applied: the belief in a right to the property must be honestly held and must relate to a legal (not merely moral) entitlement.