44 Mr Hay's evidence was also subject to the same fundamental criticism that his report was not prepared in accordance with the relevant Practice Note and was not properly supported by production of his "raw data".
45 The opinion based on the measurements made by him was further to be rejected on the basis that his initial report was formulated on the basis of a misunderstanding of the original nominal width of the floorboards laid.
46 Once again the Tribunal was entitled to form the view which it did of these matters and to reject Mr Hay's opinion on the basis of them. Once again the fundamental criticism made was sufficient to justify such rejection but in the event the Tribunal stated a further reason for rejection of the opinion.
47 It follows that ground 1 of appeal must fail. It was open to the Tribunal to reject the evidence of Murley and Hay and it did so as a matter of fact on the basis of the evidence before it and by reference to reasons which were open to it.
Ground 2
48 Ground 2 of appeal contends that the appellant was obliged to demonstrate no more than it had committed no breach of its contractual obligations not to explain the defects.
49 There are I think three levels of answer to this ground. First, the Tribunal was positively satisfied that the defects in the timber were due to poor workmanship. It did not ground its decision upon considerations of onus of proof. This is a complete answer to this ground but I elaborate the further answers.
50 Secondly, although it may be accepted that the review proceeding before the Tribunal constituted a rehearing of the question in issue, the evidence was capable of supporting findings as to circumstances bearing the inference that the defects resulted from the manner in which the floor was laid, unless additional circumstances inconsistent with such inference were established by the appellant. Thus, at its simplest, if it were accepted the floor was defective when supplied to the purchaser and a satisfactory chain of continuity subject to no material intervening cause could be established, the inference that the defect resulted from the manner in which the flooring was installed was almost inescapable.
51 It is for this reason the Tribunal observed: