 During the Second World War the aluminium works were under the control of the Ministry of Aircraft Production and provided parts for aircraft.It is rumoured that the Luftwaffe tried to destroy the works, but the bomber that was sent was shot down, crash-landing in the mountains above the village.Under the management of Henry Joseph Jack, the Aluminium Corporation of Dolgarrog acquired a controlling interest in the North Wales Power & Traction Company in 1918.