New 50 pound note

You're referring to the new £50 polymer note featuring Alan Turing!

The Bank of England introduced the new £50 note on June 23, 2021, as part of its series of polymer notes. The note features a portrait of Alan Turing, a British mathematician, computer scientist, and logician who made significant contributions to the development of computer science, artificial intelligence, and cryptography.

The note also features a pattern of tiny Turing Bombs, which were a key part of Turing's work on codebreaking during World War II. The design also includes a quote from Turing's 1950 paper "Computing Machinery and Intelligence," which is considered a foundational work in the field of artificial intelligence.

The new £50 note is made of polymer, which is more durable and secure than the previous cotton paper notes. It also features a number of advanced security features, including a hologram, a foil strip, and a see-through window.

Overall, the new £50 note is a fitting tribute to Alan Turing's groundbreaking work and legacy, and it's a great addition to the Bank of England's series of polymer notes.