Was HMS Buttercup a Flower-class corvette?
Short answerYes. She was a Flower-class corvette and later served with Belgian and Norwegian navies.
NotesThe name is not merely hypothetical: HMS Buttercup was a Flower-class corvette. The ship later served with Belgian and Norwegian navies, a reminder that individual corvettes could pass between services. The exchange is an identification rather than a full chronology, so its useful takeaway is the class and multi-navy service.