Which old British carriers might survive into a war delayed to 1942

If war began in 1942, would Hermes, Eagle, and Argus still see service?

Probably not as operational carriers; larger converted battlecruisers might remain for reserve, trials, or training roles, but the oldest carriers would be superseded.

Projected Unicorn auxiliaries and newer fleet carriers would form the center of a delayed-war force, leaving little reason to retain the oldest hulls operationally. Courageous and Glorious retain more value because of their size and speed, while Furious is particularly suited to experimental and training work. Hermes, Eagle, and Argus would probably be displaced as the Illustrious, Implacable, Indefatigable, and multiple Unicorn-type ships entered service. Treaty treatment of Unicorn as an auxiliary makes this replacement program especially plausible because it does not consume carrier tonnage in the same way.