Definitely in the digital category.
The last two Railcards I've bought (Two Together) have been discounted by purchasing online and have been instantly fulfilled digitally (most recently using a code from O2 which brought the cost down to a tenner). No worries about loss of a phone or battery life because this is a joint Railcard, we have it installed on two phones.
Doesn't need Wi-Fi either (its a misconception that it does).
The last two Railcards I've bought (Two Together) have been discounted by purchasing online and have been instantly fulfilled digitally (most recently using a code from O2 which brought the cost down to a tenner). No worries about loss of a phone or battery life because this is a joint Railcard, we have it installed on two phones.
Doesn't need Wi-Fi either (its a misconception that it does).