Covert propaganda describes the dissemination of persuasive or political material where the source, sponsor or intent is concealed, misrepresented or not made reasonably clear to the audience. In UK and Irish legal practice the term is generally descriptive rather than a defined term of art, and may arise in media law, election law, broadcasting regulation, national security, and information and communications technology (ICT) regulation.In England and Wales, Scotland and Northern Ireland, issues involving covert propaganda are typically addressed through rules on political advertising, Ofcom’s Broadcasting Code, electoral law (including controls on campaign imprints and spending), the Online Safety Act 2023, and offences relating to foreign interference or disinformation. In Ireland, comparable controls arise under electoral legislation, broadcasting regulation and online safety legislation, as well as emerging EU measures on foreign information manipulation and interference.Key legal concerns include transparency of sponsorship, protection of democratic processes, undue influence on voters, misleading communications, and compliance by social media platforms and broadcasters. Practitioners encounter the concept when advising on political campaigning, content moderation, state‑backed information operations, lobbying, and regulatory investigations into undisclosed sponsored or state‑linked content. Usage is broadly consistent across the four jurisdictions.