International Transport Workers' Federation v Viking Line ABP

International Transport Workers' Federation v Viking Line ABP (2007) C-438/05 is an EU law case of the European Court of Justice, in which it was held that there is a positive right to strike, but the exercise of that right could infringe a business's freedom of establishment under the Treaty on the Functioning of the European Union article 49 (ex Article 43 TEC). Often called The Rosella case or the Viking case, it is relevant to all labour law within the European Union (then including UK labour law).

Source: Wikipedia — International Transport Workers' Federation v Viking Line ABP (CC BY-SA 4.0)