An example I've used previously is a photograph that's used in a work for which the rights to reproduce have not been granted to us. It retains copyright by the original author or creator, who is not necessarily a government employee. In some cases it could be information that may not be publicly available, where all the rights are reserved for a specific reason. Again, the call not to give permission to reproduce could be made by the authoring agency, but those cases are very rare.
It's been our experience—and we've been working in the crown copyright administration—that as more and more information becomes available on the Internet and as more and more people can review or see information, there's been an opening in providing access. As I said, only 5% of requests are denied, and when they are denied, it's for very specific reasons.