How long in advance can I buy a Network Railcard? My Railcard expires on 3 October, but I won't be needing it (for the return portion of a ticket with one month validity) until 5 October. Can I renew it in advance, to start on the 5 October (thus saving the cost of 2 days Railcard ownership) or do I have to have complete Railcard validity throughout the ticket's validity?