The United Kingdom has a parliamentary system.
Parliamentary system . Countries with parliamentary systems may be constitutional monarchies , where a monarch is the head of state while the head of government is almost always a member of parliament ( such as the United Kingdom , Denmark , Sweden and Japan ) , or parliamentary republics , where a mostly ceremonial president is the head of state while the head of government is regularly from the legislature ( such as Ireland , Germany , India and Italy ) . United Kingdom . The United Kingdom is a constitutional monarchy with a parliamentary system of governance .