“16. Had the Defendant taken reasonable care and given the Claimant such a valuation [i.e. a careful valuation] of the Property, the Claimant would not have made the Loan available to the Borrower and would not have incurred the losses it has now incurred.”
“20. In my view, there is nothing in the Preferred Mortgages decision that supports the claimant’s argument that causation should be decided on a different basis in such cases. The fact that no claim lies in respect of the first valuation does not make the application of the “but for” test to the second valuation inappropriate or unfair. The claim in respect of the second valuation must stand or fall on its own merits, in accordance with the principles explained by Lord Nicholls in Nykredit. There is no inconsistency between that approach and the decision in Preferred Mortgages: all the money advanced to the borrower is treated as having been advanced under the new facility, which was made in reliance on the November valuation, and the existing loan was repaid out of the new advance. But did that cause the claimant loss? The relevant comparison, for the purposes of determining factual causation of loss, is with the position in the no-negligence world. That was not an issue in Preferred Mortgages. If the defendant had valued non-negligently, and so the second loan facility had not proceeded, the claimant would have been exposed nonetheless to loss attributable to the existing indebtedness. 21. I can see the force of the argument that a causation test that allows a defendant to take into account a claimant’s existing exposure that it (the defendant) negligently caused, when it can no longer be sued for that negligence, is unattractive. But that argument would not apply where the existing exposure was not the defendant’s fault, or in a case where – as here – no allegation is made that the first valuation was negligent.”