Inclusion debates/Seven Keys to Doomsday

Can someone take a look at Talk:Seven Keys to Doomsday (audio story)#Fourth Doctor? and help clear up the continuity questions there? It's clear why the play is {{notdwu}}, but I don't get why the audio would definitely be so. It's the only audio adaptation of a play that we're currently calling {{notdwu}}, and I'm not sure why we're doing that.