Was the six-gun HMS Defiance based on an unused design, and would it have been useful if built?
Short answerIt resembles a modified F2 and could serve as an emergency small-yard build, but Britain had better options.
NotesThe World of Warships Legends design appears to be based on a modified F2 battlecruiser rather than an entirely invented layout. Its principal change is the use of six 14-inch guns in place of the original larger weapons. Such a ship could be built as a compact emergency capital unit if Britain needed to use a smaller yard in 1939. It would still be merely adequate because more effective designs were available for the same strategic problem.