The bus - Unhappy with the general performance of its new rear-engined buses, KMB purchased four experimental front-engined buses from South Africa. These buses featured a Guy Victory-J single-deck chassis, suitably modified and fitted with a Bus Bodies (SA) Ltd (BUSAF) double-deck body. Similar buses were operating in Cape Town and Port Elizabeth, South Africa.

The four buses entered service in early 1976, being allocated fleet numbers G1-G4. They operated initially on cross harbour tunnel route 112. In 1982 they were withdrawn from normal service and became part of the driver training fleet.

Their success resulted in both Dennis and Leyland producing large numbers of the Jubilant and Victory Mk2 for both KMB and CMB.