"It is very important, and sometimes difficult, to remember that where a right of appeal is confined to questions of law, the appellate Tribunal must loyally accept the findings of fact with which it is presented and where, as can happen from time to time, it is convinced that it would have reached a different conclusion of fact, it must resist the strong temptation to treat what are in truth findings of fact as holdings of law or mixed findings of fact and law. The correct approach involves a recognition that Parliament has constituted the Industrial Tribunal the only Tribunal of fact and that conclusions of fact must be accepted unless it is apparent that on the evidence, no reasonable Tribunal could have reached them. If such be the case, and happily it is a rarity, the Tribunal, which is to be assumed to be a reasonable Tribunal, must have misdirected itself in law and the Employment Appeal Tribunal will be entitled to intervene."
"It is also submitted that the Tribunal's findings of fact were perverse. This involves the proposition that on the evidence no reasonable Tribunal could have reached the same conclusion. But neither we nor the Employment Appeal Tribunal had any note of the evidence which the Tribunal heard. It is no part of the duty of a Tribunal setting out its reasons to record all the evidence. In practice, in telling the story, the Tribunal will often advert to parts of the evidence, but no court having an appellated jurisdiction limited to question of law is entitled to assume that this is the totality of the evidence. If it is intended to appeal upon the ground that there was not evidence to support the Tribunal's findings, the appellant must take the necessary steps to obtain a note of the evidence."
"I fail to understand how if an appeal is based upon, or includes, an allegation that the Industrial Tribunal's decision was perverse, it is possible to contemplate allowing the appeal without having access to all the evidence bearing on the alleged perversity."
"Nevertheless, it is an approach which is not without its perils. A finding of fact which is unsupported by any evidence clearly involves an error of law. the Tribunal cannot have directed itself, as it should, that findings of fact need some evidence to support them. The danger in the approach of May LJ is that an appellate court can very easily persuade itself that, as it would certainly not have reached the same conclusion, the Tribunal which did so was `certainly wrong'. Furthermore, the more dogmatic the temperament of the judges concerned, the more likely they are to take this view. However, this is a classic non sequitur. It does not matter whether, with whatever degree of certainty, the appellated court considers that it would have reached a different conclusions. What matters is whether the decision under appeal was a permissable option. To answer that question in the negative in the context of employment law, the EAT will almost always have to be able to identify a finding of fact which was unsupported by any evidence or a clear self-misdirection in law by the Industrial Tribunal. if it cannot do this, it should re-examine with the greatest care its preliminary conclusion that the decision under appeal was not a permissable option and had to be characterised as `perverse'.
"Whenever an appeal is based on the perversity ground, this Tribunal must be extremely cautious not to conclude that the decision of the Industrial Tribunal is flawed because the Appeal Tribunal would have reached a different conclusion on the evidence or thinks that another Industrial Tribunal would have reached a different conclusion on the evidence. An appeal should not be allowed on this ground simply because the Employment Appeal Tribunal disagrees with the Industrial Tribunal as to the justice of the result, the merits of the case or the interpretation of the facts. This Tribunal should only interfere with the decision of the Industrial Tribunal where the conclusion of that Tribunal on the evidence before it is `irrational', `offends reason', `is certainly wrong' or `is not a permissible option' or `is fundamentally wrong' or `is outrageous' or `makes absolutely no sense' or `flies in the face of properly informed logic'. This variety of phraseology is taken from a number of well-known cases which describe the circumstances in which this Tribunal (and higher courts) have characterised perversity. The result is that it is rare or exceptional for an appeal to succeed on the ground of perversity. The reason why it is a heavy burden to discharge is that it had been recognised by those with wide experience and practical wisdom that there are many factual situations arising in the field of industrial relations, including sex discrimination, in which different conclusions may be reached by difference tribunals, all within the realm of reasonableness. It is an area in which there may be no `right answer'. The consequence of this approach also approved in cases of high authority, is that it is not appropriate or fruitful to subject the language of the decision of the Industrial Tribunal to `meticulous criticism' or `detailed analysis' or to trawl through it with a fine-tooth comb'. What matters is the substance of the Tribunal's decision looked at `broadly and fairly' to see if the reasons given for the decision are sufficiently expressed to inform the parties as to why they won or lost the case and to enable their advisers to identify an error of law that may have occurred in reaching the conclusion. Viewed in that way, the decision of the Industrial Tribunal is not perverse."
"... it is merely one piece of the relevant material, although it is evidence of a self-serving nature."
"The approach in the employment field is that where an employer by his unlawful discrimination has put an employee in the position of having to seek new employment in a difficult market or in circumstances where she is disadvantaged (whether by reason of having a baby or care for) or some other problem the steps which the employee takes to mitigate her loss are not to be weighed too precisely at the instance of the employer."
"... Tribunals should approach the question of mitigation on the hypothesis that the applicant was fully fit for onerous employment duties 6 months after the birth of the first child."
"Our conclusion is that the principle of the Derwent Coachworks case should be applied in the present case. In making the original award we were assessing the applicant's chances, and that calculation produces a figure. It was against that figure we intended that any wages earned in mitigation should be set."
"In the absence of evidence as to the employer's contribution this should be calculated in accordance with the Industrial Tribunals Compensation for Loss or Pensions Rights guidelines published by HMSO."