The DRA was formed on 1 April 1991 as an amalgamation of the following Defence Research Establishments: * Admiralty Research Establishment (ARE) - major sites Portsdown, Hampshire and Southwell, Dorset ("Maritime Division") * Royal Aircraft Establishment (RAE) - major site Farnborough, Hampshire ("Aerospace Division") * Aeroplane and Armament Experimental Establishment (A&AEE) - major site Boscombe Down * Royal Armament Research and Development Establishment (RARDE) - major site Fort Halstead, Kent ("Military Division") * Royal Signals and Radar Establishment (RSRE) - major site Malvern, Worcestershire ("Electronics Division")