The Pound Sterling is the official currency of the United Kingdom and a range of British territories, and it has been in circulation since 1694. Its ISO 4217 code is GBP, and it is commonly represented by the symbol £. The subsidiary unit of the Pound is the Penny, where 1 Pound equals 100 Pennies. The issuance and management of the Pound are handled by the Bank of England for England and by separate banking institutions in Scotland and Northern Ireland.Currently, there are banknotes in denominations of 5, 10, 20, 50, and 100 Pounds. Additionally, there are coins in values of 1, 2, 5, 10, 20, and 50 Pennies, as well as 1 and 2 Pounds. The British Pound ranks fourth globally in terms of trading volume, and all money changers in Hong Kong provide British Pound exchange services.

The United States Dollar (USD) is the official currency of the United States, first issued in 1792. It is identified by the ISO 4217 code USD and is commonly represented by the symbol $. The authority for issuing US dollars lies with the United States Department of the Treasury. Currently, circulating US dollar banknotes include denominations of 1, 2, 5, 10, 20, 50, and 100 dollars, along with coins in denominations of 1, 5, 10, 25, 50 cents, and 1 dollar. The U.S. Dollar ranks first globally in terms of trading volume, comprising 88.3% of the total global foreign exchange transactions. Local money changers in Hong Kong all offer the buying and selling of U.S. Dollars.