The United Kingdom has a government.
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 . A sovereign state is , in international law , a nonphysical juridical entity that is represented by one centralized government that has sovereignty over a geographic area . United Kingdom . The United Kingdom is a constitutional monarchy with a parliamentary system of governance .