National Rail Conditions of Travel - Part D: Using your Ticket

13.1 Your Ticket may show that it is valid only on certain train services, such as those of a particular Train Company, or on trains travelling via a certain route or routes. If no specific route or Train Company is shown, then (subject to any time restrictions for the type of fare you have purchased) it will be valid on:

13.1.1 any direct train service between the station(s) shown on your Ticket; or

13.1.2 as shown on the itinerary presented by the journey planner on www.nationalrail.co.uk or from a Licensed Retailer in connection with the purchase of a Ticket and/or including the relevant restrictions applying to that Ticket.

13.3 If you are using a Zonal Ticket, which allows travel within a defined geographic area, you may travel on trains which take any route within the zone or zones shown on the Ticket.

13.4 If you travel beyond the destination shown on the Ticket, you will be treated as having joined the train without a valid Ticket for the additional part of your journey. Condition 9 sets out what may happen if you travel without a valid Ticket.