I have been doing this route for a long time, travelling too and from uni so thought Id share the cheapness of it! Many other ridicolously cheap fairs on the site. Paying the real fari costs around £30, so a stunning discount, but you have to be early enough to book it! (usually around a week, tho if you miss out, the prices range from £2-£8 so still real cheap!)
This is by train so a lot quicker and nicer than national express coaches!