1st Signal Brigade is, uniquely, under the Operational Command of both Force Troops Command and the Allied Rapid Reaction Corps (ARRC). The Brigade provides Force Elements at readiness to the ARRC, Permanent Joint Headquarters (PJHQ), the Joint Helicopter Force and Other Government Departments.
The ARRC Support Battalion is responsible for providing the Staff Working Environment, Real Life Support and the Force Protection for Headquarters ARRC. 22 Signal Regiment provides the information communications systems to enable Commander ARRC to exercise command over the Corps.
30 Signal Regiment is responsible for enabling PJHQ's deployable Joint Force Headquarters and supporting other High Readiness Formations such as the Very High Readiness Field Hospital, the Air Assault Task Force and Joint Helicopter Command. 299 Signal Squadron (Special Communications) provides specialist communications support worldwide.