“It seems to us clear that in such a context, where a person has, ex hypothesi, done, or omitted to do, something with the intention of evading tax, then by adding that the conduct must involve dishonesty before the penalty is to attach, Parliament must have intended to add a further element in addition to the mental element of intending to evade tax. We think that that element can only be that when he did, or omitted to do, the act with the intention of evading tax, he knew that according to the ordinary standards of reasonable and honest people that what he was doing would be regarded as dishonest.”
“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 was 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.”
“In my view in the context of the civil penalty regime at least the test for dishonesty is that identified by Lord Nicholls in Tan as reconsidered in Barlow Clowes . The knowledge of the person alleged to be dishonest that has to be established if such an allegation is to be proved is knowledge of the transaction sufficient to render his participation dishonest according to normally acceptable standards of honest conduct. In essence the test is objective — it does not require the person alleged to have been dishonest to have known what normally accepted standards of honest conduct were.”
“...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.”