If you mean the United Kingdom of great Britain and Northern Ireland, is an island nation in Western Europe, the form of government constitutional monarchy (Elizabeth II) . You can read here. As for the advanced users, they don't need to be; ) so you know. In those places unit of currency is the pound sterling. Go across the Kingdom, but the banknotes of different areas within the UK may be different. For example, the Scottish pound may not be in England, but often accept. If You say in the UK "pound" on the money, then You will not understand. You need to talk pound (pound), which means the pound.