How can I enforce my rights?
Once you have found an infringement of your rights, the first thing that you should do is to make screenshots of the webpage using your images. This will be your evidence should the site’s owner choose to quickly remove the offending image following your initial contact. It’s also worth deciding at this point what you want the outcome of your pursuit to be as this will set the tone of your dialogue. If the image’s thief has placed it on a personal site you are unlikely to achieve more than getting them to remove it. If it’s a company that’s using it to advertise or sell something, your aim may be to acquire damages.
Next, find contact details for the page’s owner. This may be listed on the site itself, while further details including its internet service provider (ISP) can be found by using services like www.whois.net.
If you just want the image removed, a DMCA (Digital Millennium Copyright Act) Takedown Notice may be the best place to start. Once sent straight to the ISP of the violator, this notice forces them to remove the infringed content from the site without any need to speak directly to the domain’s owner. An automatically generated form can be created at www.whoishostingthis.com/resources/dmca for this purpose. While the DMCA was originally intended for use in the United States, most UK ISPS will also abide by it.
If you want to pursue someone for damages, example letters for chasing this and further advice can be found at www.epuk.org. Your email should list the infringements that have taken place and requested damage payment at a level deemed suitable for the time taken to create the work, and what it would realistically have been licensed for.