Instructions:Found this on the special offers section of the Alton towers Website.
It entitles 1 Adult and 1 Child under the age of 4 for just £13!
You just need to fill out a simple form and specify which date you would like to visit the park.
T's & C's
7.Excludes all weekends, school holidays, 29th June 2011 and 6th June 2011. Valid from 28th March-01 April, 4th April-8th April, 2nd-6th May, 9th-13th May, 16th-20th May, 23rd-27th May, 6th-10th June, 13th-17th June, 20th-24th June, 27th-28th June, 30th June-1st July, 5th-9th Sept, 12th-16th Sept, 19th-23rd Sept, 26th-30th Sept, 3rd-7th Oct, 10th-14th Oct. All dates are in 2011. Dates are subject to change - please check opening dates before your visit.