The first prototype was extensively modified, receiving new Salmson water-cooled aero-engines in place of the Hispano Suizas; other changes included the adoption of an alternative exhaust stack configuration, a 3-degree dihedral on the mainplanes, and a modified tail unit. Following these modifications, the prototype was used for several years, surviving the war and being allocated a civil registration. In August 1919 the prototype was flown from Brooklands to Amsterdam, the Netherlands as part of Vicker's exhibit at the Eerste Luchtverkeer Tentoonstelling Amsterdam.