Yes! When you book directly with Grand Central and travel on a Grand Central service, you can get 25% off Advance train tickets. This offer is available to all students with email addresses ending .ac.uk.
Once you've entered your email and got your code, simple enter your journey requirements into the "Search & Buy" box above (or use the Grand Central app), choose an appropriate Grand Central journey and enter your code at the checkout.
Just remember that if you are travelling in a group, only current students are able to receive the student train ticket discount. It’s fine for multiple people to travel together, but they will all need to be students.