The petition to put Alan Turing on the next £10 note has received over 22,000 signatures, which triggered a response from the Government:
The Bank of England has been including historic characters on its notes since 1970. The Bank welcomes suggestions from members of the public for individuals who might feature on future banknotes, and publishes a list of these suggestions on its website. These suggestions inform the process when a new note is under consideration.
The mathematician and cryptographer Alan Turing features on the list which can be found at:
This e-petition remains open to signatures and will be considered for debate by the Backbench Business Committee should it pass the 100 000 signature threshold.
So it might yet happen. The bit at the end about 100,000 signatures being enough to put the petition before the Backbench Business Committee is boilerplate for petitions on direct.gov.uk – I don’t think the Bank of England needs new legislation to dictate who goes on the notes.
As well as Turing, the names of three other mathematicians are on the list being considered by the Bank – Mary Somerville, Charles Babbage and James Clerk Maxwell.