I could jump on a GC train to London tomorrow having had the opportunity to pay on line or at the station but declined to do so and be issued a ticket without any problem. On another part of the system I could do the same thing and be issued with a ticket or accused of fare evasion.
Say I was travelling to London from somewhere in SYorks. I use my Travelmaster to get to Sheffield or Doncaster.
* If I jumped on an EMT at Sheffield I could be charged a penalty fare.
* If I jumped on an EC train from Doncaster I would be charged the full Anytime Fare.
* If I boarded a GC or HT train at Doncaster I would be charged the cheapest fare available.
This lack of a consistent ticketing system must cause confusion. It is quite easy, if changing trains at Sheffield or Doncaster, not to have to pass any notices explaining Penalty Fares or On Board Ticketing arrangements.