In most countries in mainland Europe (and, I believe, many countries in the rest of the world) train numbers (often including a one-, two- or three-letter prefix to denote the category of train, e.g. IC for Intercity, EC for Eurocity, ICE, TGV, NJ for Nightjet, etc) are published in timetables and shown on departure indicators and on the digital information displays on the sides of trains (or on the boards displaying this information in the train window, often in the window on an external door, where these are still used).
AFAIK this has never been done in Britain or Ireland (North or Republic), though. Does anyone know of any other European countries (or countries in the rest of the world) that don't do this? The only other European countries I can think of that don't are Belgium and the Netherlands, at least for domestic trains. They do for international trains, though. Not sure if BE and NL used to do it for domestic trains in the past.
AFAIK this has never been done in Britain or Ireland (North or Republic), though. Does anyone know of any other European countries (or countries in the rest of the world) that don't do this? The only other European countries I can think of that don't are Belgium and the Netherlands, at least for domestic trains. They do for international trains, though. Not sure if BE and NL used to do it for domestic trains in the past.