“The claimant submits that the Court will not disallow interest for a period unless there has been both very substantial delay and also very substantial fault on the part of the claimant. [Counsel for the claimant] relied on statements to that effect made by Mr Justice Colman in Derby Resources AG v Blue Corinth Marine Co Ltd (No 2) (The Athenian Harmony). I respectfully agree with the approach of Mr Justice Colman in that case. In my view the Court should not disallow interest unless it can be shown that the ‘predominant cause’ of the claimant being kept out of money that the Court had held he is entitled to is the claimant’s own failure to prosecute the claim, as opposed to the defendant’s maintenance of its defence.”
“In my judgment the authorities to which I have referred establish the following principles and factors as material to the exercise of discretion: (1) In principle interest is to be awarded to compensate the claimant for being kept out of the money from the date when it has been established that it was due to him; it is not based on fault or the wrongful withholding of payment by the defendant. (2) The starting date will therefore normally be the date to which the Act refers, namely the date the cause of action arose and so, in indemnity insurance (subject to any express terms of the cover) the date of loss. (3) It follows from (1) that generally the existence of and need to investigate a genuine dispute as to liability is not a material factor in postponing the running of interest. The position is not so clear where there is a dispute or uncertainty as to the quantum of the claim. It can be said that money is not due until it is at least claimed to be due in a specific amount and, as Mr Hapgood submitted, quantification of a claim is, unlike liability issues, likely to be a matter only within the knowledge of the insured. It can equally be said, however, that there is no real difference in principle from a dispute as to liability: once the answer is known it establishes not only that payment was due but also what was due and when it became due. In my judgment the latter is the better view, more in accord with the basic principle and clearly expressed by Goff J in the passage I have quoted from BP v Hunt. I would add that in the case of War Risks insurance there is, I think, and as Mr Gaisman submitted, often likely to be particular reason not to permit delays in quantification to affect interest payments as insurers must be taken to appreciate that such delays may be an inevitable consequence of losses arising from the risks they are insuring. (4) The application of these principles may be tempered by re-phrasing the question as one in terms of when the claimant could reasonably and commercially have expected to be paid. But that has never been applied to extend the starting date beyond the date when a reasonable investigation would have been completed, even if it would have resulted in a decision to resist the claim, and even then it has been used substantially in cases in which the claim can properly be viewed as sufficiently unusual as to inspire special investigation or where there is evidence of a commercial practice as to a later date of payment without an interest obligation. (5) Where a claimant assured has been guilty of excessive delay, whether in making the original claim or in pursuing it, then the starting point (or on occasion the rate of interest) may be adjusted adversely to him. The rationale for such an approach has sometimes been expressed as a form of sanction for delay but can, I think, equally and more consistently with principle, be expressed in terms that in such a case it is wrong to view the claimant as kept out of or deprived of the use of money payment of which he has delayed in seeking. A more striking illustration would be circumstances in which a claimant consciously and for his own reasons chose not to pursue a claim immediately and notified the potential defendant to that effect. To a limited extent that is said to have been the position of KAC in this case. It is not, I think, sensible to regard a party who positively chooses not to make a claim when first available to him as one who is deprived of or kept out of his money. I accept, therefore, Mr Gaisman's basic submission that, absent express agreement, interest should generally be payable from the date the cause of action for the relevant payment arose because it is from and after that date that the Claimant has been kept out of his money. Nor do I think the authorities justify a different approach in commercial or insurance cases based upon a starting date of when the payer acting honestly and reasonably would pay. They do, however, justify taking account of such considerations but only in my judgment generally on the assumption (however artificial) that the eventual outcome of disputes both on liability and quantum are resolved as they have in fact been resolved. In other words once the legal process has produced a ‘right’ result that result is treated as relating back to the date the cause of action arose.”
“(4) Where this rule applies, the court will make the orders referred to in paragraphs (2) [interest] and (3) [indemnity costs] unless it considers it unjust to do so. (5) In considering whether it would be unjust to make the orders referred to in (2) and (3) above, the court will take into account all the circumstances of the case including subparagraph (a) the terms of any Part 36 offer; (b) the stage in the proceedings when any Part 36 offer or Part 36 payment was made; (c) the information available to the parties at the time when the Part 36 offer or Part 36 payment was made; and (d) the conduct of the parties with regard to the giving or refusing to give information for the purposes of enabling the offer or payment into court to be made or evaluated.” (a) the terms of any Part 36 offer; (b) the stage in the proceedings when any Part 36 offer or Part 36 payment was made; (c) the information available to the parties at the time when the Part 36 offer or Part 36 payment was made; and (d) the conduct of the parties with regard to the giving or refusing to give information for the purposes of enabling the offer or payment into court to be made or evaluated.”