In message , at 15:52:08 on Mon, 1 Dec 2014,
Mizter T remarked:
The answer is for separate warnings to be heard in separate carriages.

Ha! That's for too complicated for train designers.

Ha! You mean the same train developers who have already managed to
implement it on Electrostars?

No, the ones who haven't changed the on-board announcements on the
Networkers in over decade to avoid their southern destination being
"BERlondon Kings Cross".

[Nor, of course, done anything to assist the passengers know whether
they are in the front or rear half of a splitter].
--
Roland Perry