The small Welbike paratrooper's motorcycle and the Welrod assassination weapon were both products of the station.
Station IX was responsible for the development and production of weapons for the SOE, which supported agents and cells of resistance throughout occupied Europe.
Newitt, secret research included military vehicles and equipment, explosives and technical sabotage, camouflage, biological and chemical warfare.
It was situated at a mansion called "The Frythe" about an hour's drive north from London near the village of Welwyn.
This was made clear in a document that was produced at the end of the war to ensure that the correct people were credited for their inventions.