The pound is the official currency of the United Kingdom of Great Britain and Northern Ireland. The pound sterling is the fourth most-traded currency in the foreign exchange market. It's known locally as a quid.
The Australian Dollar is currently the fifth-most-traded currency in world foreign exchange markets. It is also used in the Christmas Island, Cocos (Keeling) Islands, and Norfolk Island, as well as the independent Pacific Island states of Kiribati, Nauru and Tuvalu.