"(1) In determining for the purposes of this Part whether the dismissal of an employee is fair or unfair, it is for the employer to show- (a) the reason for the dismissal, and (b) that it is either a reason falling within subsection (2) or some other substantial reason of a kind such as to justify the dismissal of an employee holding the position which the employee held."
"(2) ...
"(4) Where the employer has fulfilled the requirements of subsection (1), the determination of the question whether the dismissal is fair or unfair (having regard to the reason shown by the employer)- (a) depends on whether in the circumstances (including the size and administrative resources of the employer's undertaking) the employer acted reasonably or unreasonably in treating it as a sufficient reason for dismissing the employee, and (b) shall be determined in accordance with equity and the substantial merits of the case."
"What the tribunal have to decide every time is, broadly expressed, whether the employer who discharged the employee on the ground of the misconduct in question (usually, though not necessarily, dishonest conduct) entertained a reasonable suspicion amounting to a belief in the guilt of the employee of that misconduct at that time. That is really stating shortly and compendiously what is in fact more than one element. First of all, there must be established by the employer the fact of that belief; that the employer did believe it. Secondly, that the employer had in his mind reasonable grounds upon which to sustain that belief. And thirdly, we think, that the employer, at the stage at which he formed that belief on those grounds, at any rate at the final stage at which he formed that belief on those grounds, had carried out as much investigation into the matter as was reasonable in all the circumstances of the case. It is the employer who manages to discharge the onus of demonstrating those three matters, we think, who must not be examined further."
"shall depend on whether the employer can satisfy the tribunal that, in the circumstances, having regard to equity and the substantial merits of the case, he acted reasonably in treating it as a sufficient reason for dismissing the employee."
"The amendment to s.57(3) affected bys.6 of the Employment Act 1980 produced the following wording:
'... The determination of the question whether the dismissal was fair or unfair, having regard to the reason shown by the employer, should depend on whether in the circumstances ... the employer acted reasonably or unreasonably in treating it as a sufficient reason for dismissing the employee; and that question shall be determined in accordance with equity and the substantial merits of the case.'
"20 Having taken these matters into account, it is the unanimous decision of the Tribunal that the Respondents did not conduct a reasonable investigation and, upon the investigation that they did conduct, they could not have formed a genuine belief that Mr Nyarko was guilty of the conduct complained of without further questioning him. The Tribunal was of the view that Mr Nyarko should have been questioned about how he obtained a season ticket and further evidence should have been obtained from the vehicle owners."
"19. (i) In their evidence, Mr Bryden and Mr Etheridge accept that season tickets can be used by holders for any car and in practice, may be lent to other drivers."
"(l) There was no evidence before us that the three season ticket holders from Cooper Bishopsgate had been asked whether they lent their season tickets to any third party."