Montracon Ltd v Whalley

In a civil claim involving expert evidence, the trial judge is not bound to accept an agreed medical opinion. Credibility and the interpretation of ambiguous testimony are matters for the judge, and appellate interference is justified only where the evidence was misheard or the finding cannot stand. A judge may reject expert conclusions founded on a mistaken understanding of the claimant’s account. The civil standard requires proof on the balance of probabilities; it does not require every piece of evidence to fit perfectly. A diagnosis may be established by the evidence viewed as a whole, even where one feature appears inconsistent, provided there are reasonable explanations for it. The appeal was therefore dismissed.

Gregory Whalley claimed damages from his former employer, Montracon Ltd, alleging that prolonged exposure to vibrating tools had caused hand arm vibration syndrome. Sitting at Sheffield County Court on 29 October 2004, His Honour Judge Moore awarded him £21,000, together with £840 interest. The judge accepted Mr Whalley’s account and preferred the diagnosis of HAVS despite the medical experts’ eventual agreement that the symptoms were inconsistent with the condition. Montracon appealed on the basis that the judge had wrongly rejected the agreed medical evidence, misunderstood the claimant’s evidence and misrecorded part of the transcript. The central issue was whether the judge was entitled to interpret the evidence and determine the diagnosis for himself.

Appeal dismissed. The Court of Appeal unanimously upheld the trial judge’s finding that the respondent suffered from the vascular component of hand arm vibration syndrome.

1. Lady Justice Smith held that a trial judge is not bound to accept expert opinion. Credibility is for the judge, not the experts. Where a witness’s evidence is ambiguous, or its interpretation is in doubt, the judge must determine what the witness meant. An appellate court may interfere on that issue if the judge misheard the evidence, but the discrepancy identified in the transcript here was immaterial.
2. The judge was entitled to interpret the respondent’s evidence as describing the ordinary blotchy appearance of his hands before the vascular changes began. On that interpretation, the evidence was not inconsistent with HAVS. The judge was also entitled to reject the experts’ conclusions because they depended on a different and mistaken understanding of the respondent’s account.
3. Lady Justice Smith further held that, even if the judge’s reasoning on blotchiness had been unsatisfactory, the result would remain valid. The civil standard is the balance of probabilities. It does not require every part of the evidential picture to fit perfectly. The judge could consider the whole evidence, including the truthful account, the other symptoms consistent with HAVS, the absence of a constitutional explanation and the vibration exposure creating a risk of the condition. There were also possible explanations for the apparently inconsistent symptom, including an unusual presentation or imprecise description. The evidence of Pelmear provided a reputable contrary medical view.
4. Lord Justice Wilson and Lord Justice Chadwick agreed. They emphasised that the medical experts’ conclusions were substantially based on their view that the respondent was not telling the truth, whereas credibility was a matter for the judge. The respondent’s credibility finding was not open to challenge on the appeal.

1. Court of Appeal (Civil Division) On 21 November 2005, the court dismissed Montracon Ltd’s appeal and upheld the award.
2. Sheffield County Court His Honour Judge Moore awarded Gregory Whalley £21,000 damages and £840 interest on 29 October 2004.