"(i) There is no general principle that where an otherwise successful party has put forward a dishonest case in relation to an issue in the litigation, the general rule that costs follow the event is thereby wholly displaced. I leave on one side cases such as Molloy and Arrow Nominees Inc v Blackledge[2000] 2 BCLC 167 , where the conduct in question is so grave that the entire case of the party can properly be described as amounting to an abuse of process. In such cases it is difficult to conceive how that party would ever be the successful party in the litigation… (ii) The court's powers in relation to the putting forward of a dishonest case include (a) disallowance of that party's costs in advancing that case, (b) an order that he pay the other party's costs attributable to proving that dishonesty, and (c) the imposition of an additional penalty which, while it must be proportionate to the gravity of the misconduct, may in an appropriate case extend to a disallowance of the whole of the successful party's costs, or an order that he pay all or part of the unsuccessful party's costs. (iii) In framing an appropriate response to such misconduct, the trial judge must constantly bear in mind the effect of his order upon the process of detailed assessment which will follow, in the absence of agreement, in particular to avoid unintended double jeopardy: see per Waller LJ in Ultraframe at paras 33 to 34. (iv) 'There is no general rule that a losing party who can establish dishonesty must receive all his costs of establishing that dishonesty, however disproportionate they may be': per Waller LJ in Ultraframe at para 36."
"What is required is [1] an evaluation of the nature and degree of the misconduct, [2] its relevance to and effect upon the issues arising in the trial, and [3] its tendency to create an unwarranted increase in the costs of the action"