In this very special episode, Rob and Andrew travel to what could arguably be called the spiritual home of Puzzling Maths: Bletchley Park. This extraordinary place was the birthplace of modern computing, and the workplace of Alan Turing and the famous Codebreakers.
We'd love to tell you more, but for reasons of national security the contents of this episode are classified, so ON NO ACCOUNT should you listen.*
*Unless you want to.