Oct 12, 2019 - 6:43 PM
in reply to Xmistral99
I wish I could answer that question but sadly I am unable.
I do know that if you buy a ticket from a counter or a machine it is valid for any train within a 7 day window from your nominated start date.
I bought tickets from a counter they showed a particular train departure but indicated they were valid as above.
If you buy on-line and print your own tickets then maybe you are stuck with a particular train because there is no way you could stuff an A4 sheet of paper in the machine which “validates” that you have used the ticket. It’s a strange system and I have not explored all it’s mysteries in practice.