Industrial Relations Act 1990
Removal of liability for certain acts.
12.— An act done by a person in contemplation or furtherance of a trade dispute shall not be actionable on the ground only that—
( a) it induces some other person to break a contract of employment, or
( b) it consists of a threat by a person to induce some other person to break a contract of employment or a threat by a person to break his own contract of employment, or
( c) it is an interference with the trade, business, or employment of some other person, or with the right of some other person to dispose of his capital or his labour as he wills.