Post by Jack Campin
You still can't. Ask for two, and at the next step of the transaction
your order reverts to one, with no box for adding another adult - you
can only add a child.
It's understandable how it happens. It's so that people don't buy more
tickets than are covered by a presumed single railcard and thereby
unwittingly breach the railcard rules. So, for example, ticket machines
generally insist that if you are using a Family and Friends Railcard you
must at least one child and no more than four child tickets and at least
one and no more than four adult tickets. It's perfectly permissible to
buy just child or just adult tickets, but you need to be warned that you
need some of the other sort, and not too many, for the railcard to be valid.
Disabled railcards allow discounts for two people, so machines let you
buy two discounted tickets; senior railcards only allow one so they will
only sell you one.
The easy answer would be to have the machine ask, like on-line ticketing
sites, how many railcards of each type are held, but while that isn't
done an assumption of one railcard per transaction is not unreasonable.
"I bought tickets for me and my wife with my railcard. It most be
allowed or the machine wouldn't have sold them, would it?"