Could a Lion-class battleship have been converted into an aircraft carrier?
Short answerTechnically yes, but it would be uneconomic because the hull would already be worn out.
NotesAlmost any ship can be converted if enough money is spent, but the Lion-class proposal fails on practical grounds. The hull would already be badly worn. A costly carrier reconstruction would therefore be an unsound investment. Technical possibility does not make a conversion sensible force planning.