“In respect of claims for interest, that is essentially a claim for interest as damages. In this respect: a. The position for an extended period was that damages were not available for simple late payment of a debt; see Chitty on Contracts at §29-287 b. The House of Lords in Sempra Metals v Inland Revenue Commissioners[2008] 1 AC 561 , however, considered (obiter) that damages for loss as a result of late payment could be recoverable; see §16.1 c. Sempra Metals was departed from in Prudential Assurance Co Ltd v Revenue and Customs Commissioners[2019] AC 929 insofar as the earlier decision related to the availability of compound interest in restitutionary claims. However, the obiter comments that compound interest may be available as damages was not in issue before the Supreme Court in Prudential Assurance and was not considered; see §44 and §79. d. More recently, the approach of the Court to awarding interest as damages was considered by the Privy Council in Sagicor Bank Jamaica Ltd v Seaton[2023] 1 WLR 1759 . The Board conducted an examination of the principles to be derived from Sempra Metals and concluded at §37: ‘In summary, interest, including compound interest, may be awarded as damages for breach of contract. A plaintiff seeking interest as damages where the defendant has withheld money in breach of contract must plead and prove its loss.”
“The modern development of the law recognises that a delay in payment can be causative of loss. However, such loss must be actual or real, not theoretical; Sagicor Bank at §33. The loss must be pleaded and proved. 37. This, neither A nor Dr Samastur do. The proof of debt, such as exists, merely states that the Company “declined to refund me the payment of interests of delay from29/12/2018 to15/6/2020 ” [CB/48]. No further information is provided in Dr Samastur’s statement ([CB/100]) or in A’s evidence supporting this application. 38. What A and Dr Samastur do is essentially state that there has been a delay in payment, and therefore there is a right to interest. That is not right in law. Whilst theoretically a delay in payment can be the basis of a claim in damages it is necessary to prove loss was caused by the delay. This has not been attempted by A.”
“(2) … the creditor’s claim may include interest for periods before the [date the liquidation commenced] although not previously agreed or reserved … (3) If the debt is due by virtue of a written instrument and payable at a certain time [when] interest may be claimed … from that time to the [date the liquidation began]”