How to get the new King Charles III banknotes

The new King Charles III banknotes will start appearing in shops and banks from early June onwards, but if you want to guarantee getting your hands on the first banknotes as soon as they are released, you can.
There are two ways of getting your hand on the first of the new banknotes.
King Charles III banknotes (c) Bank of England
The Postal Option
You can send some banknotes to the Bank of England using their postal replacement banknote service, and they will ensure that your replacements will h