The prefix WC refers to webcasts — valid works of DWU fiction which are first released as online audio-visual broadcasts (even if they are later rereleased in another distribution format). This includes:

• original DWU video works first released on licenced websites such as BBC.co.uk (e.g. Real Time)
• original DWU video works first released on external video-sharing platforms on a licensed channel (e.g. the official Doctor Who YouTube channel) or otherwise known to be licensed.

It does not refer to:

• text stories, comics, video games or other such non-video media published exclusively online (i.e. PROSE: 42 Prologue, COMIC: The Return of the Vostok)
• verbatim Internet rebroadcasts of existing video or audio stories; the appropriate non-WC prefix takes priority, even when simulcast
• web-based e-books of text stories originally published elsewhere (i.e. PROSE: Lungbarrow)
• non-narrative fiction hosted on websites maintained by the BBC;
• Water Closet