In a small town outside of Leicester lies a little known secret, the factory that developed the jet engine. Whetstone was the site of Frank Whittle‘s factory, where jet engines were developed. Babcock Services, ITP Engines Ltd and Converteam now occupy the site, with smaller companies renting space (mainly for storing commercial vehicles). Until 2002 the site still sounded an air raid siren at 8am to wake up workers. The site of the Whittle factory became the English Electric Company (Later GEC) a significant part of several Nuclear power stations were made there in the 1960s and 70s. English Electric was one of the largest Engineering Companies in the Leicester area, employing thousands of workers and training hundreds of apprentices each year. At one point more than 4,000 workers had to be shipped in from Middlesex to help labour shortages and many settled permanently causing a boom in the late 60s. The computer performance measurement called the “Whetstone” was developed by English Electric at the factory and takes its name from the town.