"27. In the light of these factors [which they carefully set out] it may be that some disciplinary sanction short of dismissal could be said to have been a reasonable response to the facts as found. But we remind ourselves that it is not for us to substitute our view for that of the employer in this matter. The test that we have to apply is whether the disciplinary sanction fell within the band of reasonable responses. In other words 'Was dismissal the response of a reasonable employer'? Having given the matter the most careful and anxious consideration, we have concluded that it is impossible for us to say that the respondent's decision to dismiss the applicant for this act of serious misconduct fell outside the band of reasonable responses."