“In determining whether the prosecution has proved that the defendant was acting dishonestly, a jury must first of all decide whether according to the ordinary standards of reasonable and honest people what was done was dishonest. . . If it was dishonest by those standards then the jury must consider whether the defendant himself must have realised that what he was doing was by those standards dishonest. In most cases, where the actions are obviously dishonest by ordinary standards, there will be no doubt about it. It will be obvious that the defendant himself knew that he was acting dishonestly. It is dishonest for a defendant to act in a way which he knows ordinary people consider to be dishonest, even if he asserts or genuinely believes that he is morally justified in acting as he did. For example, Robin Hood or those ardent anti-vivisectionists who remove animals from vivisection laboratories are acting dishonestly, even though they may consider themselves to be morally justified in doing what they do, because they know that ordinary people would consider these actions to be dishonest.”
“...although a dishonest state of mind is a subjective mental state, the standard by which the law determines whether it is dishonest is objective. If by ordinary standards a defendant’s mental state would be characterised as dishonest, it is irrelevant that the defendant judges by different standards. The Court of Appeal held this to be a correct statement of the law and their Lordships agree.”