You can claim whatever you want. You can claim the sky is made of cheese. Don't make it true. It's debatable whether, under UK law, you can claim copyright on

You can claim whatever you want. You can claim the sky is made of cheese. Don't make it true. It's debatable whether, under UK law, you can claim copyright on an image that's just a straight scan of a public-domain/out-of-copyright image. Usually you need to do some sort of work to get the "sweat of the brow" copyright protection. Though it's quite common for places that scan images (like libraries) to claim copyright. This is a big problem when OpenStreetMap mappers want to trace from an old map.