There a number of national rail cards available which will generally provide a 34% discount. The types of card available are listed below with a link to web page which will provide full details.
The cost for an annual card is £30, with the exception of the Disabled Persons Railcard which is £20. Three year cards (except the Two Together & Network Cards) may be purchased on-line for £70 (Disabled £54).
Local Rail Cards
Devon & Cornwall Railcard
As the name suggests this card provides a 34% discount off journeys within Devon & Cornwall but the discount is restricted to off-Peak travel. Cost is £10 for a 1 year card. There are other benefits too. Click here for further information.
If you spend time in London you may find an Oyster Card beneficial. This link includes a description of the card and how it works.
To go straight to details of fares with and without an Oyster card click here.
National rail cards may be added to an Oyster, you do this at any Tube booking office.
Oyster cards may be used for some journeys on National Rail in the London area. See this link for a map –
One day Travelcards
Travelling to London Waterloo it is possible to buy a One day Travel card, which covers the journey to London and unlimited travel on National Rail, London Overground, Buses, Docklands Light Railway and Tramlink services within London Zones 1-6. The off-peak card allows travel on the 06:45 from Exeter Central as that train arrives in London after 10:00 (10:19).