"Section 238(1). This section applies to an employee who has a right to complain of unfair dismissal (the "complainant") and who claims to have been unfairly dismissed, where at the date of dismissal - (b) the complainant was taking part in a strike or other industrial action. (2). In such a case an employment tribunal shall not determine whether the dismissal was fair or unfair unless it is shown - (a) that one or more relevant employees of the same employer have not been dismissed … (3). For this purpose 'relevant employees' means - (b) in relation to a strike or other industrial action, those employees at the establishment of the employer at or from which the complainant works who at the date of his dismissal were taking part in the action."
"6(a) Was Mr Warner taking part in the strike? The question must be decided objectively, not by reference to whether the respondents acted reasonably or what their state of knowledge was. (b) Being on strike means not working when one is contractually bound to. Taking part in industrial action means doing or refraining from doing something by way of exerting pressure on the employer. Sympathizing with a strike or other action is not the same as taking part in it; nor is demonstrating one's solidarity with it; nor voting for it. (c) Mr Warner was not, when the applicants were taking their action, bound to come to work, or do or refrain from doing anything incidental to his employment with the respondents. He was off sick and was recognised as being so. He was not refusing to work the new shifts, nor refusing to work at all. He might not be described as taking part in a strike or industrial action."
"Whether a employee is taking part in strike action is, as we have said, a question of fact. Whether an employee's activity represents a breach of his obligation to attend work, may be relevant to the question whether he is taking part in a strike, but it is not in our view, an essential ingredient. We would take, as an example, the case of an employee who is for the time being on holiday or away sick. That employee by reason of his holiday entitlement or his sickness would not be in breach of his contractual obligation to work; but if he associated himself with the strike, attended at the picket line or took part in the other activities of the strikers with a view to furthering their aims, he would, in our view, be capable of being held to be taking part in the strike. Any other view would be to make nonsense of the plain language of the phrase 'taking part in the strike or other industrial action'. The phrase is not 'on strike'; a person on holiday is not 'on strike', he is on holiday. But he may nonetheless be taking part in strike action."
" … we must remind ourselves that Parliament has constituted the Industrial Tribunals the sole judges of what does and does not represent the process of 'taking part' in a strike, and that we have no jurisdiction to interfere with their conclusion unless it appears to us to be so startling as to offend reason. Having regard to the particular experience and expertise of the Tribunals in the field of industrial relations, we have to take the utmost care, moreover, when applying the criterion of reasonableness, not to fall into the error of substituting our own view of the evidence for theirs."
" … the essence of a strike involves a concerted withdrawal of labour … and circumstances would have to be very exceptional indeed before it could accurately be said of a servant lawfully absolved under his contract of employment on the grounds of ill-health from supplying any labour at all to his master that he had been engaged in the process of withdrawing labour."