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In page Cordite:

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At the start of World War I, cordite was in production at Waltham Abbey Royal Gunpowder Mills and by seven other suppliers (British Explosives Syndicate Ltd, Chilworth Gunpowder Company Ltd, Cotton Powder Company Ltd, Messrs Curtis's and Harvey Ltd, National Explosives Company Ltd, New Explosives Company Ltd and Nobels Explosive Company Ltd).[3] Existing factories were expanded and new ones built, notably by Nobel's at Ardeer, HM Factory, Gretna, which straddled the Scotland-England border at Gretna, and the Royal Navy Cordite Factory, Holton Heath. A factory was also established by the Indian Government at Nilgris. Both the Gretna and the Holton Heath cordite factories closed at the end of World War I.[citation needed]