The Defence Cyber Operations Group was designed to deliver cyber capability and mainstream cyber security throughout Defence by establishing a federation of cyber units. As this work matured it resulted instead in the formation of the Joint Forces Cyber Group in May 2013.
The Joint Forces Cyber Group (JFCyG) plans and co-ordinates cyber operations, and develops new tactics, techniques and plans to deliver military capabilities to confront high-end threats. It comprises Joint Cyber Units at Cheltenham and Corsham, the Joint Cyber Unit (Reserve) and Information Assurance Units.
I am withholding details on the JFCyG as their disclosure would, or would be likely to prejudice the capability, effectiveness or security of the Armed Forces.