Empty coaching stock
Also: ecs, empty train, not in service
A passenger train running with nobody aboard, on its way to start a service or go to the depot.
Example
5
A10
An example headcode.
Trains have to get from depots to where their first service starts, and back again at night. While they do, they run empty, as empty coaching stock.
Their headcodes start with 5, and they appear in the working timetable but not the public one.