Pyestock was one of a number of top-secret sites which would bolster the UK’s standing during the austere 1950s; and become a vital component of the White Heat of Technology in the twitchy 1960s. It was arguably the world’s leading research facility into the research and design of gas turbines (or jet engines). “V” bomber, Harrier and Tornado engines were designed and refined in its custom test facilities; the air plant and custom cells could fly a Concorde engine at Mach 2 from the safety of the ground; all the gas turbines used by the Navy were put through harsh, enduring sea-worthiness tests; and the hush-hush top-secret captured Soviet engines were discretely tested for performance and reverse engineered. By the turn of the new millennium, the world had changed. The theory behind the technology was well understood and tests could be simulated on computer rather than physically run in power-hungry, resource-sapping testing cells. Personnel gradually moved to new facilities and Pyestock slowly emptied and eventually stood down.