Only 278 Mk.22s were manufactured before production changed over to the Mk.24. The Mk.24 had a slightly improved Griffon engine and a five blade propeller. 27 of the final Mk.22s were converted to Mk.24s and 54 new mk.24 aircraft were produced. These last of the breed sported four Hispano Mk V 20mm cannons and zero-length underwing rockets.