The first time a three colour process - Dufaycolor - was used in a British picture (for two sequences). Its only other cinematic exposure in a feature film was Sons of the Sea (1939).
The name of the radio network - National Broadcasting Group - gives the initials NBG. In 1930's Britain this stood for "No Bloody Good".
Lily Morris's debut.
The characters of William Garland and inventor A. Bird are obvious references to John Reith ("garland/wreath") and John Logie Baird
Bill Dwyer's reporter character is identified in the dialogue as "Mr. Worthington". Charlie Clapham is referred to only as the editor's son.