1st Intelligence, Surveillance and Reconnaissance Brigade is responsible for all British Army ISR capabilities. The Brigade is comprised of 19 units of 10 Regular and 9 Reserve units, approximately 3,300 Regular and 3,000 Reservist personnel, including elements from Royal Signals, Royal Artillery and all seven of the Army’s Military Intelligence battalions, as well as Specialist Group Military Intelligence, Land Intelligence Fusion Centre and the Defence Cultural and Linguistic Support Unit.