Ticket restrictions. Many types of ticket cannot be used at certain times of day, on certain days of the week or on certain trains. These ticket restrictions can be complicated, and even familiar tickets such as cheap day returns can have different restrictions on different routes.
If a passenger travels on a train on which their ticket is not valid, it is more likely that the restrictions were not properly explained to them than that they are deliberately trying to avoid paying the right fare. We believe that it is up to the train operators to make sure that each passenger understands the restrictions which apply to the ticket which they are sold.
Under rule 7, a passenger may not be charged a penalty fare if he or she has a ticket for the journey which they are making that is not valid on that train only because of a ticket restriction. In these cases, the passenger only needs to pay the excess fare, in line with the National Rail Conditions of Carriage.