This was announced by the Bank of England on Twitter.
Alan Turing is perhaps best known for his codebreaking work during the Second World War.
In recognition of this, we have collaborated with @GCHQ on their toughest puzzle ever - based on the Turing £ 50 note design.
Could you be the next Alan Turing?
👀 https://t.co/akPf8B7Mpdpic.twitter.com/03B6AfLhk0
- Bank of England (@bankofengland) March 25, 2021
During World War II, Alan Turing worked at the Government School of Codes and Ciphers.
He led the group responsible for cryptanalysis of messages from the German Navy.
Turing developed a number of hacking techniques, including the theoretical basis for the machine used to hack the German Enigma encryption device.
The banknote will go into circulation on June 23 - Turing's birthday.
Earlier, the Central Bank of Russia told about plans to update the design of banknotes until 2025.