“The borrower’s obligation to repay was therefore not so collateral or remote as to be disregarded altogether in measuring the lenders’ loss, and although the valuer was not a party to the mortgage, and the mortgage was literally res inter alios acta, it was a transaction with which the valuer’s report and valuation and breach of duty were closely connected, as now demonstrated by the decision of Park J in Yianni v Edwin Evans & Sons[1982] QB 438 . If, therefore, the borrowers had suddenly found themselves in sufficient funds to repay the lenders’ advance, and had repaid it in full before the valuer’s liability was established, I do not see how the lenders could have recovered more than nominal damages, or perhaps some expenses in investigating the condition of the property, because the lenders would have suffered no loss in consequence of the valuer’s breach of duty. There are, of course, cases in which the lender can recover damages from a wrongdoer for tort and breach of contract, notwithstanding that he has been already compensated, e.g. by benevolence, private or public, or by insurance (though he had paid premiums for that), and the wrongdoer cannot get out of paying compensation himself by relying upon the uncovenanted benefit conferred on the plaintiff by another: see Parry v Cleaver [1970] A.C. 1, 14, per Lord Reid. But if an advance secured by the borrower’s reliance on a false valuation of a property becomes in fact an advance which needs no security, but is repaid without recourse to the property, then in my judgment the valuer may be fortunate enough to be able to rely on the borrower’s repayment in diminution of the lender’s loss and of the compensation he is legally liable to pay for it.”
“In any case such as this, the important question is, what is the scope of the duty of care undertaken by the valuer? The scope of the duty of care is determined by the transaction itself. As Lord Nicholls indicated, it is in relation to the transaction that one determines the liability of the valuer. The transaction in the present case was the mortgage which was granted on the basis of the respondent’s valuation in January 1997. That transaction resulted in no loss to the appellants by reason of the fact that the mortgage, which was the consequence of the valuation, was fully redeemed. It follows that, although there might have been an inchoate liability to the appellants by the respondents as a result of the assumed negligent over valuation between March and November, once November came and that mortgage was fully redeemed, that liability ceased because that transaction had pro tanto been satisfactorily completed.”