De La Rue insider reveals insight into banknote design

The Financial Times has an interesting article dated 28 April 2014 in which Andy Sharman interviews Malcom Knight, "former research and development director and now consultant at De La Rue, the discreet British banknote maker that has designed more than 40 per cent of the paper currency to have entered global circulation in the past two years."

Courtesy of Jim "Rubycored" Chen.