At present it is not possible to buy Priv-rate tickets online, by phone, or from
ticket machines.
Where the station has a staffed ticket office, you must purchase a valid
ticket before you start a journey, irrespective of the length of queue or wait
time.
If the ticket office is closed and local ‘promise to pay’ tickets are available
from vending machines you must obtain one before travelling.
If you board a train from a station with an open ticket office and have no
ticket, or from a station where ‘promise to pay’ tickets are in use and you
haven’t obtained a ‘promise to pay’, the train operator is within their right
to refuse to sell you a Priv-rate ticket and report it as a Travel Irregularity.
Only if the ticket office is closed, and there is no local ‘promise to pay’ in
use, can you buy a Priv-rate ticket on board a train. You must actively seek
out staff on-board the train, have your fare ready and offer to pay it at the
first available opportunity. By offering to pay there can be no question that
you are trying to travel without paying.
If you don’t actively offer to pay, then you may be accused of fare
avoidance, and risk committing a Travel Irregularity. (See the separate
section on Travel Irregularities for the consequences).