“The concept does not, in my view, certainly involve any conduct of the complainant amounting to a breach of contract or a tort. It includes, no doubt, conduct of that kind. But it also includes conduct, which while not amounting to a breach of contract or a tort, is nevertheless perverse or foolish, or, if I may use the colloquialism, bloody minded. It may also include action which, though not meriting any of those more pejorative epithets, is nevertheless unreasonable in all the circumstances. I should not, however, go so far as to say that all unreasonable conduct is necessarily culpable or blameworthy; it must depend on the degree of unreasonableness involved.” 40. As the EAT made clear in Steen , the assessment of contributory fault, both as to the finding of contributory conduct and as to the determination of the amount of any reduction, is for the ET (see Hollier v Plysu[1983] IRLR 260 , CA) and its reasoning in that regard is to be read in the round, avoiding any pernickety criticism (see per Richardson J in Feltham Management Ltd v FelthamUKEAT/0201/16 at paragraphs 55 to 59). 41. Lastly, but importantly, where an appeal against the decision of the ET is pursued on the basis of a perversity challenge, there is a high threshold. There must be an overwhelming case that no reasonable Tribunal, on a proper appreciation of the evidence could have reached the decision in question (see Yeboah v Crofton[2002] IRLR 634 ). The Appeal and the Claimant’s Submissions in Support 42. The Claimant’s appeal has been pursued on five grounds, albeit that, for the purposes of this hearing, she has taken grounds one and two together - both relating to the ET’s finding that the dismissal was substantively fair, the finding that forms the basis for the ET’s Polkey reduction. Similarly, grounds three and four have been taken together - both relate to the ET’s Decision to make a further 80% contributory fault reduction. Ground five concerns the Claimant’s complaint relating to the ET’s finding on victimisation. 43. On the first and second grounds, it is the Claimant’s case that, save for its finding on the wrongful dismissal claim, the ET failed to reach any determination as to the seriousness of her conduct. By ground one, she complains that in determining that her dismissal was not substantively unfair, the ET erred by taking into account an irrelevant factor, namely her failure to pull together with the rest of the staff in respect of the financial difficulties, (paragraph 95). That was not the reason given in the dismissal letter, or relied on by the First Respondent in the ET3 or in argument before the ET, and it had not been identified in the list of issues, meaning there was an error for the ET to consider it (see per Langstaff J at paragraph 51 Land Rover v ShortUKEAT/0496/10 and at paragraph 70 in Chandhok v Tirkey[2015] IRLR 195 ); it was not for the ET to conduct a broad assessment of the Claimant’s conduct outside the Respondents’ pleaded case. In any event, any failure of a Claimant’s part to pull together in respect of the financial difficulties could not amount to misconduct and the focus of section 98 had to be on the reason for dismissal (here, the alleged gross misconduct). By ground two, the Claimant contends that the ET also erred by failing to reach its own decision as to the fairness of the dismissal: the test was not whether the First Respondent reasonably considered the conduct to be gross misconduct - it was not for the employer to be the final arbiter of its own conduct in dismissing the employee (see Bowater at paragraph 18) - it was ultimately for the ET decide (see Burdett v Aviva at paragraphs 29 to 30). The ET ought properly to have first determined whether the conduct in issue was sufficient reason for the Claimant’s summary dismissal and then considered whether the First Respondent acted reasonably, in accordance with the substantial merits and equity of the case; it being a rare case where conduct that was insufficiently serious to amount to gross misconduct would warrant dismissal, see per Bean LJ at paragraph 61 Newfound v Thames Water Utilities Ltd[2015] IRLR 734 . 44. By grounds three and four, the Claimant turns to the ET’s finding on contributory fault, contending that it failed to provide adequate reasons in this regard. In general terms, employment litigation would be impossible if employees were not entitled to relay information that would otherwise be confidential to their solicitors; given that solicitors were bound by duties of confidentiality, there could not properly be said to amount to a breach of confidence. Given its findings in the context of the wrongful dismissal claim (that the Claimant had copied the invoices in a very specific context and had then disclosed them to a professional with their own duty of confidence), the ET needed to explain why this was found to be blameworthy conduct (see Nelson v BBC (No.2) ). Additionally, the ET needed to further explain why it determined that any reduction should be assessed at 80%. In the alternative, the ET’s finding of contributory fault and/or finding that the reduction should be as much as 80% was perverse. 45. By ground 5, in relation to the claim of victimisation, the Claimant complained that, having found (i) that her actions in copying the invoices to her solicitor amounted to a protected act, and (ii) that she had been dismissed for doing so, it was perverse of the ET to dismiss the Claimant’s victimisation claim. The Respondents’ Submissions in Response 46. In general terms, the Respondents contend that the Claimant is taking an overly pernickety view of the ET’s reasoning, contrary to the guidance laid down in RSPB v Crouch . 47. Turning to the first ground of appeal - the objection that the ET took into account an irrelevant consideration - the Respondents say the Claimant is misreading the ET’s finding in this regard: it was not finding that this was the principal reason for the dismissal, or even an act of misconduct in itself, it was, however, part of the context, as was the loss of trust in the Claimant. The Respondents’ pleadings and evidence before the ET provided a sufficient basis for such a finding. The principal reason for the dismissal was as set out at paragraph 95 of the ET’s Judgment, but the ET did not err in also assessing context (and see Bowater at paragraphs 11 to 12). In any event, even if this was an inappropriate finding, it did not vitiate the conclusion reached ( Jones v Mid Glamorgan CC[1977] ICR 815 at 826 (c) to (e)). 48. As for ground two – relating to what was said to have been the ET’s failure to reach its own decision regarding fairness – it was apparent that the ET had correctly directed itself as to the correct test and the need to question if the conduct was reasonably capable of amounting to gross misconduct (per Burdett v Aviva ); degrees of misconduct were not a feature of section 98 (see Quintiles v Barongo ) and even if the Claimant succeeded on this ground it was hard to see how the ET’s finding that she might, in any event, have been fairly dismissed could be challenged as a result – the assessment of that question was for the ET. 49. Turning to grounds three and four, and the argument that the ET’s finding on contributory fault were inadequately reasoned, it was wrong to consider paragraph 100 of the ET’s Judgment in isolation. The ET had itself cross-referred to paragraphs 103 to 104 and its finding that the Claimant should not have copied and sent invoices to her solicitor; it was entitled to find that conduct was blameworthy and there was adequate explanation for that finding. Moreover, contrary to ground four, there was nothing perverse in the ET’s finding the Claimant’s challenge did not meet the high test required (see Yeboah v Crofton ). The ET had paid careful regard to the Claimant’s conduct and had been entitled to find that this was blameworthy, given that she had disclosed invoices when she should not have done. 50. As to ground five – relating to the victimisation claim - this was also put as a perversity challenge but, in truth, the Claimant was seeking to re-argue the distinction between act and manner of act (see Martin v Devonshires ). The ET had permissibly concluded the dismissal was not in response to the doing of a protected act but some feature of it that was entirely separable. The issue was whether the EqA element was an operative cause and the answer was that it was not: it was not the protected acts but the Claimant’s conduct in copying and sending the invoices that was the reason for the dismissal. In this regard, it was significant that, at paragraph 93, the ET had found the reason for dismissal was the Claimant’s conduct in copying, and then sending to her solicitor, copies of the invoices. The Respondents’ submission as follows: “… Rather than go through appropriate channels and, following same, the Claimant chose to take matters into her own hands. She clandestinely took photographs of confidential invoices from a self-employer contractor. She had no legitimate business reason to be looking at these. She admitted to this conduct. Based on the facts, information, and evidence obtained during its investigation, the company was accordingly entitled to summarily dismiss her. Its actions were within the band of reasonable responses available to an employer in the circumstances and taking into account the size and administrative resources available to the Respondents.”