I've got a bundle of these that I've been working my way through during the summer but I've finally got fed up of going there!!
They were an offer on the back of car park tickets, & are basically 'buy one, get one free'. (Some say BOGOF, some say Adult pays, child goes free & some say Child pays, adult goes free, but all are the same ?? saving). Their website is hattonworld.com if you want more information about what you could do there.
I'm advertising them on ebay under 'lavenderbluetree' but as I've still got quite a few, if anyone from Mumsnet wants to buy them & let me know I'll send 2 vouchers - at least that way I'll cover my Ebay charges & get (hopefully) some feedback as a seller.
Let me know if you're interested.
catyc at supanet dot com