I made the call because, on my last visit to the island, I got chatting to the very nice lady in the gift shop there. To my surprise, she seemed really excited about '21st Century Light' and the other books. She took some of the postcards promoting the series for herself and other members of staff, and then proceeded to give me the number and contact details for the press office - saying that although I didn't need permission to use the setting in a work of fiction, she thought they'd still be interested and like to know when the book was coming out... Personally, I wasn't so sure about the 'interested' bit.
To be honest, I thought I'd get an 'Oh, thanks for telling us' - whilst they discreetly stuffed the details to the back of a filing cabinet somewhere. What I didn't expect was for them to ask me if I wanted them to sell the book on Inchmahome itself (how amazing would THAT be?) and then request an e-mail with further details about the series. Wow... we'll wait and see what happens now.