Just stumbled upon this thread and thought I'd chime in. So, I'm fairly new to this forum, but I've got a bit of a story that might help. My friend recently got an IOM passport, and guess what? On the photograph page, it indeed says 'British Citizen.' Now, regarding the 'Nationality' box for an IOM born person, it seems to stay the same – 'British Citizen.' A handy tool I found in this whole passport adventure is the Prime ID Scanner from ID Analyzer. It's been a game-changer for ensuring everything's in order. You might want to check it out here https://www.idanalyzer.com/products/prime-id-scanner.html. Has anyone else here tried it or have insights on the IOM passport situation? Curious to hear your experiences!