"94. (1) An employee has the right not to be unfairly dismissed by his employer…………. 98 (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 a reason falling within subsection (2) ……… (2) A reason falls within this subsection if it – (c) is that the employee was redundant ……. (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. 139 (1) For the purposes of this Act an employee who is dismissed shall be taken to be dismissed by reason of redundancy if the dismissal is wholly or mainly attributable to – (b) the fact that the requirements of that business– (i) for employees to carry out work of a particular kind, or (ii) for employees to carry out work of a particular kind in the place where the employee was employed by the employer, have ceased or diminished or are expected to cease or diminish."
"…the language of paragraph (b) is in my view simplicity itself. It asks two questions of fact. The first is whether one or other of various states of economic affairs exists. In this case, the relevant one is whether the requirements of the business for employees to carry out work of a particular kind have diminished. The second question is whether the dismissal is attributable, wholly or mainly, to that state of affairs. This is a question of causation. In the present case, the tribunal found as fact that the requirements of the business for employees to work in the slaughter hall had diminished. Secondly, they found that that state of affairs had led to the appellants being dismissed. That, in my opinion, is the end of the matter."