A secret correspondent writes (I've filed all the serial numbers off to make sure no-one gets into trouble:
I don't know how common knowledge this is- in radio scripts the term OMNES is used to mean 'all,' as in everyone speaks the same line. But in radio land everyone knows what it means. Or certainly should do.
A friend got a script turned down by Radio Four with one of the script reader's comments being "I am not convinced the character Omnes has been sufficiently developed in this script, and seems rather incidental to the story."
Which made me LOL.