De La Rue had been regarded as the leading banknote paper manufacturer in the world, having manufactured banknote paper for the Bank of England since 1724. In 1997, De La Rue acquired Harrison and Sons, the stamp and banknote printers based in High Wycombe. The factory closed permanently in 2003. In early 2002, De La Rue took over ownership from Smurfit Diamond Packaging Corporation of Sequoia Voting Systems, a California-based company that was a large provider of electronic voting systems in the U.S., for U.S. $23 million. After losing money for three years in a business way out of the company's traditional lines,
Hippolyte De La Rue was in any case abandoned soon after, as Australia concentrated on participation in the Empire Air Training Scheme. Some time in the latter half of 1940, De La Rue was seeing dinner guests off the base at RAAF Richmond, and attempted to re-enter the perimeter via the main gate. Wearing civilian clothes and without his security pass, he was challenged and then locked up by the guards, who did not recognise him or believe his assurances that he was their commander. De La Rue was finally released by the orderly officer but was still fuming the next morning; only the