The demo scene on the ZX Spectrum can probably be traced back to Castor Cracking Group and a few other groups back in 1986. The Speccy demo scence was slow to start, but it started to rise in the late 1980s, most noticably in eastern Europe.
... First printing at August 1941 was 15.000. Paper survived through the occupation. Group also had espionage and escape network and produced false ID papers for resistance ...