Seems like quite a good offer and beats their online price per ticket.
Receive one free Ticket when a full priced Adult Ticket (at £32) is purchased (excluding Family, Advance and Website tickets).
Only one offer per voucher per transaction. The offer is valid from 19th March – 29th April 2011. Excluding Bank Holiday Friday, Saturday’s, Sunday’s and Monday’s. The voucher must be surrendered at the ticket booth to claim this offer. No cash refund or alternative is available. This voucher cannot be used in conjunction with any other offer or promotion, including Family, Advanced and Website tickets. Originals only accepted – no photocopied, damaged, defaced or altered vouchers.
See draytonmanor.co.uk for opening dates and times.