Pair of Alton Towers tickets, valid for tomorrow, Wed 30th May 2012 ?

I am selling a pair of Alton Towers tickets valid only tomorrow, Wednesday 30th May 2012. I won these tickets but not able to go. Worth a lot more than just 25 for BOTH tickets...great day out in the sunshine! Pick-up only from North London/Hertfordshire area. I live in Barnet. Thanks