RNPF Caerwent was a propellant factory, built as a successor to RNCF Holton Heath (1938). Supplied the bulk of propellant for the Ryal Navy from around 1946. Manufacture on site included nitroglycerine, nitrocellulose and picrite (probably tetryl as well for gaines). The main final product was cordite for Naval gunnery. Closed as a propellant factory in 1965 when production was moved to Bishopton in Scotland. Subsequent uses included manufacture of materials for gramophone records and a joint RAF/USAF missile store. Also some work on engine testing. As others have pointed out, more recent use includes training for police and Army.