In message , James Farrar
writes

That wonderful new DVA system they have just fitted has an option to
announce all stations along the local for us.

FSVO "wonderful"!

Incidentally, how are we supposed to tell the difference between a
train going HX-H4-H123-HX and one going HX-H123 and terminating there?
Surely the first case should be announced as "Heathrow Terminal 4" not
"Heathrow Terminals 1, 2, 3"?

That is a problem that has exercised us for some weeks now. General
feeling is that (apart from a very few exceptions) all T123 trains call
at T4 first and the tube map indicates this. The driver can make an
appropriate announcement at HX if they are not calling at T4, which is
booked to be only about 5 trains all day, very early morning/late night.
Those that run direct to T123 for timekeeping purposes during the day,
which isn't awfully common anyway, would only usually know once they
arrive at HX and get the 'wrong' signal.

Of course, before they modified them, all trains just showed Heathrow
Airport which ever way they would get there, so the driver had to make
an announcement at HX.

We've asked for the destination to revert back to this, pending the T5
bit opening and the subsequent revisions of services to there.
--
Steve Fitzgerald has now left the building.
You will find him in London's Docklands, E16, UK
(please use the reply to address for email)