Because the political system evolved over time, rather than being changed suddenly in an event such as a revolution, it is continuously being defined by acts of Parliament and decisions of the Law Courts (see Constitution of the United Kingdom).
由於政治制度隨時間演化，而非由於革命等的事件而倏地改變，它是不斷地由議會法案和法院判決來界定（參見英國憲法）。