Without the fire, how long might HMS Victorious have remained usable?
Short answerUntil about 1975 at the latest, and possibly less.
NotesWithout the fire that preceded her withdrawal, HMS Victorious might have remained usable only into the mid-1970s. About 1975 is given as the latest plausible retirement date, with an earlier departure also possible. Avoiding the fire would therefore have offered a limited extension rather than keeping the carrier in service indefinitely. This estimate sets a useful boundary for counterfactual Royal Navy carrier planning.