I just got an email from the People's Postcode Lottery with a voucher for a free day out on the 30th November. Details below:
"On Sunday 30th November if you bring along our voucher, or a copy of the Postcode News, you are free to visit your choice of three visitor centres in Scotland! To print out your voucher, and to see a map of the Visitor Centres just click here."
Hopefully this is of interest.