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1) Government Operated Facilities 

1. Chemical Defence Experimental Establishment – Porton Down, Wiltshire, England

2) Private Companies & Contractors 

1. Professor Jackson (H.M. Indian Army), York , Yorkshire, England
2. Enderley Mills, Newcastle-under-Lyme, Staffordshire, England
3. Kane’s Military Furniture Factory, Dublin, County Dublin, Ireland
4. Thomas Stokoe, Hay-on-Wye, Breconshire, Wales

3) Public Armaments, Explosives, Aircraft & Ship Building Companies 

1. Vickers-Armstrong Limited, Crayford, Kent, England
2. The National Explosives Company Limited, Hayle, Cornwall
3. The British & Colonial Explosives Co. Ltd., Perranporth, Cornwall
4. British Small Arms Factory, Birmingham, Warwickshire