This incident has been resolved.

Connection to the seat reservation system has been restored by our provider and bookings with seats are now available again. We will continue to monitor the service.

The issue has been identified and a fix is being implemented.

We are unable to make train seat reservations at the moment due an outage with the connection to the National Rail seat reservation system. This means that Advance fares (and other train fares requiring seat reservations) will not be available. This is a national outage and our provider is working on this issue as their highest priority.