The Supreme Court visited the long outstanding issues of how a Court should assess dishonesty and gave clear guidance that
…there can be no logical or principled basis for the meaning of dishonesty (as distinct from the standards of proof by which it must be established) to differ according to whether it arises in a civil action or a criminal prosecution. Dishonesty is a simple, if occasionally imprecise, English word. It would be an affront to the law if its meaning differed according to the kind of proceedings in which it arose. It is easy enough to envisage cases where precisely the same behaviour, by the same person, falls to be examined in both kinds of proceeding.”
“These several considerations provide convincing grounds for holding that the second leg of the test propounded in Ghosh does not correctly represent the law and that directions based upon it ought no longer to be given. The test of dishonesty is as set out by Lord Nicholls in Royal Brunei Airlines Sdn Bhd v Tan and by Lord Hoffmann in Barlow Clowes: see para 62 above. When dishonesty is in question the fact-finding tribunal must first ascertain (subjectively) the actual state of the individual’s knowledge or belief as to the facts. The reasonableness or otherwise of his belief is a matter of evidence (often in practice determinative) going to whether he held the belief, but it is not an additional requirement that his belief must be reasonable; the question is whether it is genuinely held. When once his actual state of mind as to knowledge or belief as to facts is established, the question whether his conduct was honest or dishonest is to be determined by the fact-finder by applying the (objective) standards of ordinary decent people. There is no requirement that the defendant must appreciate that what he has done is, by those standards, dishonest.”