Crofter Hand Woven Harris Tweed Co Ltd v Veitch [1941] UKHL 2 is a landmark UK labour law case on the right to take part in collective bargaining.

The right of workmen to strike is an essential element in the principle of collective bargaining.In the Harris Tweed industry on the Isle of Lewis in the Outer Hebrides, several independent producers of tweed cloth were in a dispute with the Transport and General Workers' Union over working conditions.

Lord Chancellor Simon said, If the predominant purpose is the lawful protection or promotion of any lawful interest of the combiners (no illegal means being employed) it is not a tortious conspiracy, even though it causes damage to another person.

[2] In the present case the pressure was applied by means of action by the dockers, who were in no sense employees in, or directly connected with, the trade in Harris tweed; but employees in this trade were members of the same union, and the interest of the dockers and the trade employees in the union and its welfare were mutual, and I can see no ground for holding that it was not legitimate for the union to avail itself of the services of its docker members to promote the interests of the union.Lord Wright affirmed that the union had a right to take part in collective bargaining and more than that said, It cannot be merely that the Appellants' right to freedom in conducting their trade has been interfered with.

The right of workmen to strike is an essential element in the principle of collective bargaining.