'The Twinsectra test'
In the case of Twinsectra Ltd v Yardley  2 AC 164 Lord Hutton said that ‘(Their) Lordships should state that dishonesty requires knowledge by the defendant that what he was doing would be regarded as dishonest by honest people, although he should not escape a finding of dishonesty because he sets his own standards of honesty and does not regard as dishonest what he knows would offend the normally accepted standards of honest conduct.’ In the case of Barlow Clowes International Ltd & Anor v Eurotrust International Ltd & Ors (Isle of Man)  UKPC 37 the Privy Council observed, ‘Their Lordships accept that there is an element of ambiguity in these remarks which may have encouraged a belief, expressed in some academic writing, that Twinsectra had departed from the law as previously understood and invited inquiry not merely into the defendant's mental state about the nature of the transaction in which he was participating but also into his views about generally acceptable standards of honesty. But they do not consider that this is what Lord Hutton meant. The reference to "what he knows would offend normally accepted standards of honest conduct" meant only that his knowledge of the transaction had to be such as to render his participation contrary to normally acceptable standards of honest conduct. It did not require that he should have had reflections about what those normally acceptable standards were. ‘Similarly in the speech of Lord Hoffmann, the statement (in para 20) that a dishonest state of mind meant "consciousness that one is transgressing ordinary standards of honest behaviour" was in their Lordships' view intended to require consciousness of those elements of the transaction which make participation transgress ordinary standards of honest behaviour. It did not also to require him to have thought about what those standards were.’
4th Edition » | Chapter 4