"Both versions, novel and audio I think are valid, but I wouldn't argue about overlaying the novelisations policy on all of the first series of Benny audios, not just the Doctor Who New Adventure derived ones. As Dragons' Wrath (audio story) especially suffers the adaption process being cut down from a full novel to a single story CD."
I'd say that Target novelizations and Big Finish adaptations of novels aside from Birthright and Just War should remain as valid sources, even if they're secondary to the original versions, while audio versions of Birthright and Just War should be marked as non-DWU, but stay on the wiki.