What is the name of the machine the broke the German’s WWII codes? Clue: it’s not called the Enigma Machine! The re-emergence of Bletchley Park as a centre for international security discussions amidst the evolving landscape of AI technology highlights the timeliness of the Cocoon Tower project situated in this cradle of computing. The inspiration for these unique residential towers came partly from the history of Bletchley as the centre for code-breaking during WW II. During those years (1938-45), Bletchley Park was the operational headquarters for the top mathematicians from Oxford, Cambridge and London, and the birthplace for the Bombe machine which was used to decipher and decode the German Enigma machine. The geometry of ‘Cocoon Towers’ is a fusion of the Bombe’s circular shapes and the logic of off-site manufacturing (OSM) as well as incorporating the ideas of cross-laminated timber (CLT) construction. Programmatically, the buildings operate as clusters of vertical villages. The outcome of environmental analysis and simulations were integrated to balance the performance of energy consumption, solar gains and views for the end-user. The marrying of function and form re-establishes the signature of Bletchley’s history as a pivotal node for the future Cambridge-Oxford knowledge belt.