http://www.merlin.kelloggs.co.uk/

You can now enjoy 2 for 1 entry to one of many amazing attractions in the UK and Ireland. Simply cut out a voucher from one of our promotional packs, shown below, and present it at your chosen attraction in order to receive 2 for 1 entry when you purchase one full price adult entrance ticket.

You could be saving up to £44 with every voucher. Voucher valid 01.10.12 to 31.10.13. UK and RoI residents only.

Terms:
http://www.merlin.kelloggs.co.uk/terms_conditions.html