“For what, then, is the valuer liable? The valuer is liable for the adverse consequences, flowing from entering into the transaction, which are attributable to the deficiency in the valuation. This principle of liability, easier to formulate than to apply, has next to be translated into practical terms. As to this, the basic comparison remains in point, as the means of identifying whether the lender has suffered any loss in consequence of entering into the transaction. If he has not, then currently he has no cause of action against the valuer. The deficiency in security has, in practice, caused him no damage. However, if the basic comparison throws up a loss, then it is necessary to inquire further and see what part of the loss is the consequence of the deficiency in the security. Typically, the answer to this further inquiry will correspond with the amount of the loss as shown by the basic comparison, for the lender would not have entered into the transaction had he been properly advised, but limited to the extent of the overvaluation. This was the measure applied in the present case. Nykredit suffered a loss, including unpaid interest, of over£3m . Of this loss the amount attributable to Erdman’s incorrect valuation was£1.4m , being the extent of the over-valuation.”
“The trouble is that it throws out not only the bathwater of the extraneous and coincidental but also the baby of the subsequent events which were the very thing against which the lender relied upon the valuation to protect himself.”
“Mr Sumption attempted to justify a valuation at the date of breach of duty by saying that it would be wrong if the damages could be different according to when the trial was held. Leaving aside the retort that this is bound to be a consequence of his concession on the value of the personal covenant, I think that there is no such general principle. On the contrary, except in cases in which all the loss caused by the breach can be quantified at once, the calculation of damages is bound to be affected by the extent to which loss in the future still has to be estimated at the date of the trial. In actions for personal injury, it is common for a trial on the quantum of damages to be deferred until the plaintiff’s medical condition has stabilised and the damages can be more accurately assessed. There is however a limit to the time for which the parties can wait. So the assessment of damages will often be different from what it would have been if the trial had taken place later. This result can be avoided only by postponing the trial until the plaintiff is dead or (as Mr Sumption’s theory would entail) confining the damages to the loss which at the time of the accident he appeared likely to suffer, irrespective of what actually happened. Neither of these solutions has appealed to judges or legislators.”
“Realisation of the security does not create the lender’s loss, nor does it convert a potential loss into an actual loss. Rather, it crystallises the amount of a present loss, which hitherto had been open to be aggravated or diminished by movements in the property market. I can see no necessity for the law to travel the commercially unrealistic road. The amount of a plantiff’s loss frequently becomes clearer after court proceedings have been started and while awaiting trial. This is an everyday experience”
“It seems to me that although the quantum of the Claimant’s loss against the defendant’s solicitors has not crystallised, that does not mean that I should begin to speculate on whether they might one day not make a loss. One does not know what tomorrow may bring; whether this property will shoot up in value, or whether it will, for reasons of market movement, become worthless.”
“As the learned justices in the High Court are careful to state, it is impossible to devise a principle so general as to be capable of covering the great variety of benefits from one source or another which may come to an injured man after, or because, he has met with an accident. Nor, as was said by Dixon C.J. in Espagne’s case (1961) 105 C.L.R. 569, is much assistance to be drawn from intuitive feelings as to what it is just that the wrongdoer should pay. Moreover, I regret that I cannot agree that it is easy to reason from one type of benefit to another. ”