Elizabeth II has seen devolution in the United Kingdom.
Elizabeth II . She has seen major constitutional changes , such as devolution in the United Kingdom , Canadian patriation , and the decolonisation of Africa . The United Kingdom is a unitary state with devolution , is governed within the framework of a parliamentary democracy under a constitutional monarchy , in which the monarch , currently Queen Elizabeth II , is the head of state and the prime minister of the United Kingdom , currently Theresa May , is the head of government .