I was looking at the opw.ie site and I came across a cost sheet for taking images of the inside of castles. But the way is was written seemed to lean towards commercial film.
There is also a site called http://www.copyright-free-photos.org.uk/castles/ which allows for limited images.
I only shoot stills.
I have started emailing all the Castles to get their input. So far I have approval for Birr castle for the outside.
I am working on one castle that might get me full access to the castle except the owners areas. But i am waiting for the l