Year 9 students put themselves in the shoes of Alan Turing and his team of Bletchley Park codebreakers as they raced to crack the Nazi codes. Students were given a taste of various types of codes, such as the transposition and pig-pen cyphers, and made wheels to enable them to decipher Caesar shifts. Some even managed to use frequency analysis and crack the Vigenere cypher, which used to be thought impossible! A career at GCHQ may await…