A four-ship Audacious-class carrier fleet

What if Britain built all four Audacious-class carriers, did not refit Victorious, and avoided mixed-class changes?

The Royal Navy would gain four capable carriers likely to serve into the 1980s, with a more sustainable force even if none matched the largest US ships.

Four Audacious-class ships would not equal the largest American carriers, but they would provide a durable and credible fleet into roughly the 1980s. Their utility and relative affordability could also preserve room for other Royal Navy construction rather than concentrating resources in a single extensive rebuild.