In article , nmtop40
writes

There is a complete timetable for the line which shows exactly where
each train should be and when. All the destinations for a train for the
whole day are preplanned.



Strange how they regularly change the destination from that displayed on
the dot matrix indicator at Morden each morning. No courtesy
announcement to passengers of the change of course. To do so could be
considered helpful and we can't have that can we?

Clive