I know that a Network Railcard is not valid before 10am but given that the "railway day" starts at (I think) 04:30, I had assumed it was valid for post-midnight departures. However, on checking on the Southeastern website, there seems to be no railcard-discounted fare on the 00:12 HS1 departure to Ashford. A railcard-discounted fare is available in the 23:37 departure but this also involves travel "before 10am" as the service does not arrive into Ashford until 00:14. Is there an anomaly here?