What kind of Royal Navy ship could be commissioned as HMS Princess Margaret?
Short answerA capital ship or similarly prominent future combatant, perhaps a sufficiently large Type 83.
NotesHMS Princess Margaret would need to be a capital ship or another exceptionally prominent combatant. A personal royal name carries more weight than a label that could be assigned to any hull. In the modern fleet, a sufficiently large Type 83 is the kind of future ship that might fit.