On which British banknote does Alan Turing appear?

Alan Turing appears on the Bank of England’s £50 note. His portrait is on the reverse of the red polymer note introduced in 2021, alongside imagery connected with his mathematics, computing and wartime codebreaking.

The note honours Turing as a mathematician, computer scientist and World War II cryptanalyst. Its design includes a photograph by Elliott & Fry, technical drawings related to the Bombe, and references to his work on early computers. Turing was selected after a public nomination process for a scientist to feature on the new denomination.

The first Turing £50 note entered circulation on 23 June 2021, the 109th anniversary of his birth. A later version bearing King Charles III’s portrait on the front entered circulation on 5 June 2024, but Turing remains on the reverse.

A common mix-up is confusing Turing’s note with the £20, which features artist J. M. W. Turner, or the £10, which features author Jane Austen. Turing is associated specifically with the Bank of England £50.