Would an M-class submarine aircraft carrier have been able to hold a Fairey Swordfish?
Short answerNo, because the concept depended on much smaller aircraft designed for the submarine's limited space.
NotesThe answer is a direct no. The M-class submarine aircraft concept used very small aircraft designed around the available space. A Fairey Swordfish would therefore fall outside the practical size of the arrangement. The exchange is brief, but it identifies aircraft dimensions rather than the mere presence of a hangar as the limiting factor.