Gloster Gladiator (4 options) Gloster Gladiator Mk.I 'GK.Z' of 80 Squadron, Royal Air Force, based at Sidi Barrani, Egypt, August 1940. Gloster Sea Gladiator Mk.I N5520,'S' of Hal Far Fighter Flight, based at Hal Far, Malta, June, 1940. Gloster Gladiator Mk.I K7974,'RT.O' flown by Pilot Officer Percy Oliver Valentine Green of 112 Squadron, Royal Air Force based at Summit, Sudan, June, 1940. Gloster Gladiator Mk.II L9033, of 5 Squadron, Egyptian Air Force, 1940.