The United Kingdom.

There are four constituent countries in the United Kingdom of Great Britain and Nothern Ireland.They are England, Scotland, Wales and Nothern Ireland. It is a constitutional monarchy and parlamentary democracy with a queen and a parliament that has two houses:The House of Lords and the House of Commons.The currency in Britain is the Pound sterling.The official language in Great Britain is English, althogh Welsh, Scots and Gaelic are also spoke.