I’m a very big fan of 1 destroyer, 1 fighter, 1 bomber. I don’t think I’d want to do what taamvan described and save 10 IPCs.
Most games right now that’s my G1 purchase because it’s useful and helps to keep the UK honest.
I’d rather have the fighter already. Who knows, UK might screw up in the med. (or dice screws them) and you are better off landing that extra fighter on the Italian stack at Alexandria.
2 planes are useful for Sea Lion or Barbarossa. The destroyer can only be used against the Russian sub. But a destroyer is still useful for Sea Lion when combined with the cruiser (assuming a wounded Bismark did not make it back to SZ 112 from SZ 111).
If the air base is also successfully bombed on G2 (turn transports are purchased), than it’s probably that the UK doesn’t pay the minimal off. If they do, you might have to Italy try again :) Even still, if going Sea Lion, you did buy 2 planes, so you might afford enough planes in SZ 110 on G3 to prevent a scramble.