What is the primary currency used in the United Kingdom?

The primary currency used in the United Kingdom is the Pound Sterling. This currency is denoted by the symbol "£" and is divided into 100 pence. The Pound Sterling is one of the oldest currencies still in use today, with its origins tracing back to Anglo-Saxon England.

While the European Union uses the Euro as its official currency, the United Kingdom chose not to adopt it after it left the EU. The Yen is the currency of Japan, and the Dollar refers generally to currencies used by several countries, including the United States. Therefore, Pound Sterling is the correct choice as it represents the official currency of the UK, reflecting its economic identity and global financial operations.