Parliamentary sovereignty is a fundamental principle in the legal system of the United Kingdom, which asserts that the Parliament is the supreme legal authority. This means that Parliament can create or repeal any law without being challenged by any other body, including the courts. This principle emphasizes that no law passed by Parliament can be overridden or declared invalid by any other institution. Consequently, Parliament has the ultimate power to legislate on any matter, reflecting the democratic will of the people through their elected representatives.