Throughout the war Trojan ceased vehicle production and focussed on precision engineering components and munitions for the war effort. They did produce complete Trolley Accumulators which were used to start aircraft engines, as well as Bomb trolleys and oil bowsers. All of these were a simple hand operated trolley mounted on standard pre-war Trojan wheels. They also manufactured parachute supply canisters used during "operation market garden". Because of their importance to the ministry of war they established their own home guard unit to defend the works.