I know the Eurostar announcements at St Pancras are normally English and French; is Dutch ever used when referring to the officially bilingual Brussels though?
I don't remember hearing it, probably because native speakers of Dutch are very likely to understand English and most of the Flemish will also understand French.
The English/French native speaking train managers on Eurostar heading to Brussels do have a good go at announcing in Dutch, but it's not terribly easy to pronounce
correctly!
Many UK airports used to be pretty much monolingual (i.e. English only) when it came to announcements as well, regardless of the flight destination. However, many have now bought an automated announcement system that solves the problem.
"Platform zeven is trein nummer negen-één-vier-acht voor Kales, Rijsel en Brussel Zuid"?
The use of "for" is interesting for the train destinations, that seems to be a feature of English (and its transport terminology) as I've only heard
naar/nach/à (to) used in that context in other languages.
