New banknotes featuring the portrait of King Charles III have now entered circulation, but it may be some time before they are commonly seen in wallets and purses, the BBC reports.
The new Bank of England notes will gradually replace those which are damaged, or will be issued when demand increases.
The King is only the second monarch to appear on these notes, with Queen Elizabeth II first featuring in 1960.
Shoppers can still use current circulating £5, £10, £20 and £50 notes carrying the portrait of the late Queen.
The reverse side of current polymer Bank of England banknotes, which in ascending order feature Sir Winston Churchill, Jane Austen, JMW Turner and Alan Turing, are unchanged. Notes issued in Scotland and Northern Ireland feature other images, and not the monarch.
The first new banknotes were printed last year, with the long lead-in time allowing automated machines that accept cash to be updated to recognize the new designs. The King’s portrait is based on a picture taken in 2013.