161.—(1) For the purposes of Part XI of the Employment Rights Order (unfair dismissal) the dismissal of an employee shall be regarded as unfair if the dismissal was made—N.I.
(a)for a reason set out in sub-paragraph (2), or
(b)for reasons the main one of which is one of those set out in sub-paragraph (2).
(2) The reasons are that—
(a)the employee acted with a view to obtaining or preventing recognition of a union (or unions) by the employer under this Schedule;
(b)the employee indicated that he supported or did not support recognition of a union (or unions) by the employer under this Schedule;
(c)the employee acted with a view to securing or preventing the ending under this Schedule of bargaining arrangements;
(d)the employee indicated that he supported or did not support the ending under this Schedule of bargaining arrangements;
(e)the employee influenced or sought to influence the way in which votes were to be cast by other workers in a ballot arranged under this Schedule;
(f)the employee influenced or sought to influence other workers to vote or to abstain from voting in such a ballot;
(g)the employee voted in such a ballot;
(h)the employee proposed to do, failed to do, or proposed to decline to do, any of the things referred to in paragraphs (a) to (g).
(3) A reason does not fall within sub-paragraph (2) if it constitutes an unreasonable act or omission by the employee.