For travelcards and passes (London)
All full-time students are entitled to a 30% discount on Travelcards and Bus and Tram Pass in London if they have an 18+ Student Oyster card. You can apply for your Student Oyster card on the Transport for London (TfL) website.
For Pay-as-you-go fares discount
For a 34% discount on pay-as-you-go fares for London Underground and Docklands Light Railway (linked to an Oyster card registered to your name), and trains nationwide, you can apply for a 16-25 Railcard or 26-30 Railcard on each of their website according to your age.
To link your Railcard to your registered Oyster card, simply ask a member of staff in a London Underground station to do it for you.
Please check their website for terms and conditions and FAQ.