==Wipe / Junk authorisation== 
 The BBC's blue forms were definitely "Wipe / Junk authorisation" forms – obviously depending on whether the material was videotape or film, or whether the videotape was to be wiped and reused or completely destroyed. So "junking" was certainly in use by the 1960s. See Andrew Pixley, "No Further Interest", Nothing at the End of the Lane, Issue 2, Summer 2005.