The UK ams to have King Charles banknotes in circulation by 2024

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The central bank announced that the picture of The King will appear on existing designs of all four polymer banknotes (£5, £10, £20, and £50). The King’s image will feature on the front of the banknotes, as well as in a cameo in the see-through security window.”
Charles, 74, ascended to the throne following the death of his mother, Queen Elizabeth II, in September.
The Royal Mint previously revealed that the first coins containing his picture went into circulation earlier this month.
According to AFP, the new banknotes contain an engraved portrait of Charles based on a photograph owned by the royal household and made available in 2013.
The design was finalized in recent months and authorized by the king, according to the statement, with the notes set to be mass-produced in the first half of 2023.
Current polymer banknotes — which have been gradually replacing paper money in the UK since 2016 — containing the queen’s portrait will remain legal tender and can continue to be used.
The new notes will only be issued to replace old predecessors and to satisfy any overall rise in demand, according to the central bank, minimizing the change’s environmental and financial impact.
This indicates that notes featuring both monarchs will circulate beginning in mid-2024.