Fair point it was the NB, trying to answer too many questions.
Okay, but if it's that, is she concealing that she's NB from her colleagues?
If she is clearly "out" as NB at the office then again, an e-mail to people in the office mentioning it is not revealing anything to anyone.
In this case everyone in the trial and everyone here apparently knows. Are we breaching sensitive personal information?
You can't simultaneously tell people something and claim they're breaching your "sensitive personal data" when they discuss it among themselves. Disclosing it to a third party that you would not have told is where the protection should be kicking in.