The Bank of England 20 Pound Note Series F Prefix AB is a banknote issued by the Bank of England, which is the central bank of the United Kingdom. The banknote was first issued in 2007 and features a portrait of economist Adam Smith on the reverse side, along with a depiction of the division of labor in a pin factory.

As a historical artifact, the Bank of England 20 Pound Note Series F Prefix AB is a tangible link to the economic and cultural history of the United Kingdom in the early 21st century. It would be of interest to collectors of banknotes and currency, historians studying the economic history of the era, or anyone interested in the history of British monetary policy.