Actually, the Gladiator could be flown in several sectors: the Chinese had some, although the A6Ms soon put an end to them; the Finns flew them (Gloster vs. I-16); they actually flew over France during the Sitzkrieg (Gloster vs. Bf110); as well as against the Vichy French in Iraq and Syria, the Italians over Malta, etc.
It's the aircraft I argue is most missed for early war AAAF.
Those who don't remember their history are bound to do something or other...