You may have a claim for Intellectual Property Rights (“IPR”) Infringement against the other party for the profit that they have made on using your “work” without your express permission unless you have signed a written assignment of your IPRs.
Your cause of action is in Copyright and Trademark Infringement, which arises naturally as soon as someone commits text to paper or computer screen. The copyright to the text of this conversation is owned by me! However, it is a very weak right and the burden of proving copying and direct financial loss because of the infringement is very high. However, the images may be protected under an EU Creative Commons Licence which is stronger.
Damages for IPR Infringement are account of profits to the claimant for monies obtained through use of the work.
There is a six-year limitation period for a Claimant to issue Court Proceedings for IPR Infringement from the date that the infringement was first discovered by the Claimant or first ought to have been discovered. IPR Infringement is a “continuing tort” and a claimant’s cause of action in law against the defendant is refreshed each day that the tort continues. Therefore, a claimant may issue court proceedings, but damages can only be recovered for that part of the loss which arose within the six-year period prior to the commencement of proceedings.
You should seek legal advice as soon as possible after you are aware that your legal rights may have been breached by another party. I suggest that you instruct specialist IPR Solicitors to review this matter in full, advise you on your prospects of success and commence any IPR Court Proceedings on your behalf.