“This is relevant as it may be that the Tribunal had evidence before it that the employment of the Claimant would in any event have come to an end at any particular stage. That might result in compensation, although sought for a longer period, being limited. One obvious example would be if the Respondent in a case has ceased trading shortly after dismissal. That would lead the Tribunal in that type of case to conclude that the employee would have seen his or her employment end in any event at the time when the Respondents ceased trading.”