Finally on the editorial code then, look at the heading, "Subterfuge". It's the last page of the code before you turn to "Personal behaviour":
"Journalists should generally identify themselves as GNM employees when working on a story. There may be instances involving stories of exceptional public interest where this does not apply. That needs the approval of a head of department ..."
And so on. What is exceptional public interest and why have you chosen to put a higher test than a public interest test here?