As rapid development proceeded on the Costa del Sol, and the influx of expatriate retirees from northern European countries, notably Great Britain, increased during the late 1970s and 1980s. It has since then sometimes been referred to in the press of the United Kingdom as the "Costa del Crime", because British criminals would escape justice at home by moving there to live their lives in luxury. The presence of the Italian Camorra in the Costa del Sol is also so strong that Camorra bosses refer to it as "Costa Nostra" ("Our Coast"), according to Italian journalist Roberto Saviano, a specialist on the Naples criminal underworld. With tense relations between the UK and Spain over Gibraltar, extradition arrangements were not at that time agreed. This phenomenon has been alluded to in films and television shows such as "Auf Wiedersehen, Pet", "Bad Girls", and "The Olsen Gang on the Track", as well as in the more recent films "Sexy Beast" and "The Business". Some of the more famous British criminals known to have fled to the Costa del Sol in the past were Charlie Wilson, Ronnie Knight, Freddie Foreman, Anthony Fraser (grandson of Mad Frankie Fraser), and more recently Andrew Moran. John Disley, nicknamed the "King of Marbella", (not to be confused with the international criminal Monzer al-Kassar whose nickname is the "Prince of Marbella"), masterminded a £700,000 bank fraud. Other European criminal entrepreneurs, many of Russian and Dutch origin, have also settled on this coast for the climate and functional advantages for their enterprises, as well as being active investors in the property sector.