Bletchleyite
Veteran Member
Could the ticket barriers be made to print seat reservations on your ticket as you go through?
This would seem the obvious way to do it: as you present an open travel ticket to the barrier it works out the next available journey option on which there is capacity, makes the reservation and prints the trains and seat numbers on the ticket.
Eurostar's barriers can do something like this, they print a separate ticket. It'd be expensive to add it to NR for what is likely a short term requirement.