If you don't know what you are doing when setting up a system largely trained on general American announcement voices (which I wager is true in the case of Readspeaker), I would not be confident for it to deal with a Scottish voice, given the surprising complexity in a Scottish voicebank compared to a general American (say New England) accent. We now have a Sonya AI built upon the voice of someone who is otherwise quite well articulated, as seen with the station announcements.
I question why the AI is necessary for every single announcement, instead of just the ones that apparently need to be generated on-the-fly (on that note, does the present 380 system, as quirky and oddly-faulty as can be, even work with such needs? And why couldn't conductors perform such an announcement manually if necessary?).