The Royal Ordnance Factory was a WW2 Ministry of Supply Explosive Factory. It is sited adjacent to the village of Bishopton in Renfrewshire, Scotland. The factory was built to manufacture the propellant cordite for the British Army and the Royal Air Force. It also later produced cordite for the Royal Navy. The Ministry of Works were responsible for the site. It was the biggest munitions factory the MOD had, with up to 20,000 workers.