National Rail is offering 2-for-1 on Alton Towers tickets when purchasing a National rail ticket for the day of your visit.
To obtain this offer you must print the 2-for-1 voucher and show your National Rail ticket at the Alton Towers ticket booth on arrival.
It may be worth doing this even if you are not travelling by train. A cheap single ticket is usually available for a couple of pounds (e.g. to the next station on the line).
So just stop by the nearest station on your way and pick one up. Then present both to get your 2for1.
This offer is only valid until November 8, 2013.
For full details and to print the 2-for-1 voucher visit the Days out guide website.