R (Factortame Ltd) v Secretary of State for Transport

The Factortame case involved a conflict between UK law and European Union law. Factortame Ltd., a Spanish fishing company operating in UK waters, challenged UK legislation that limited foreign-owned fishing vessels, claiming it violated EU rules allowing free movement of goods and companies. The UK government initially refused to allow their boats to operate, citing national law. The case went to court, and ultimately, EU law prevailed over conflicting UK laws. This case established that EU law takes precedence over national laws when there is a conflict, reinforcing the principle of EU law supremacy in member states' legal systems.