“The claimant was dismissed for gross misconduct and that outcome and characterisation was upheld upon appeal. A key aspect of the misconduct related to the use of a policy which had been superseded. Although there were other allegations, the respondent concluded “your failings on this job stem from not using the latest version of the procedure” [para 61, final sentence]. In assessing the severity of the misconduct and the appropriate sanction, it is tolerably clear that the respondent proceeded upon the basis that the Claimant has been issued with the updated (2017) policy and had the means to access it, given his supervisory role. It transpired that was erroneous [para 189 of judgement]. That was clarified by the Respondent as at the point of appeal [para 85 of judgement]. In the face of that material error, central to the assessment of the fairness was whether the appeal decision maker adequately took account of those changed circumstances and that the appeal was conducted in a way that cured that earlier defect. It was for the tribunal to scrutinise the procedure as a whole and determine its fairness in that context [s.98(4) Employment Rights Act 1996 ]. Having acknowledged the error at dismissal stage [para 189], the Tribunal’s reasoning at para 191 et seq. implies a substitution mindset based upon the Tribunal’s own views rather than reasoning which the appeal manager relied upon. The Tribunal’s impermissible substitution of its own views on the conduct and its severity vitiate the decision.”