How are train crew notified of late amended station stops after they've started their shift?
As in, you book on at x o'clock with the station stops listed on your duty board for the day.
Then journeycheck throws in a few additional station stops 'because a train was cancelled'.
GWR▸ need to tell all the crew, not just the driver!
They usually receive a signed form known as a 'Stop Order' or 'Not to Stop Order' from a member of station staff (which is also given to the Guard). Occasionally this isn't possible in which case they act on verbal authority from the signaller or control (both are on recorded lines).