United Kingdom is a monarchical country located off the northwestern coast of Europe. It is formed by England, Northern Ireland, Scotland and Wales. The people of this union are called British.The United Kingdom's population surpasses 60 million. With this number UK is the third most crowded country in the European Union. Its overall population density is one of the highest in the world. Almost one-third of the population lives in England's prosperous and fertile southeast lands and is especially urban and suburban with 7.2 million in the capital of London, which remains the largest city in Europe.The UK is one of the most developed countries in the world. It has the fifth largest economy in the world. It was the world's foremost power during the 19th and early 20th centuries,however the economic cost of World war I and II diminished its leading role.However the UK remains a major power with strong military,cultural,economic and political influence and is a nuclear power, with the second highest defensive spending in the world after USA. Queen Elizabeth II is the chair woman. She is the constitution of the state. UK does not have a formal constitution. The Constitution of the United Kingdom consists mostly of written sources, including statutes, judge made case law, and international treaties.The Parliament of the United Kingdom has two houses. They are elected House of Commons and appointed House of Lords. The present of England is selected from House of Commons. Other countries have their own prime ministers but all of them are ordered by queen.