The Special Air Service is the United Kingdom's elite Special Forces Battalion (1), formed in 1941 it is a part of the United Kingdoms Special Forces Group(2) (UKSF) which consists of the Special Air Service, Special Boat Service(3) and the new Special Reconnaissance Regiment (4), as well as support units, the newly created Special Forces Support Group(5), UKSF signals and air units supplied by 8th Flight of the Army Air Corps.(6)

The Special Air Service is made up of three regiments; the 21st, 22nd and 23rd regiments, the 21st and 23rd regiments are territorial (reserve) regiments made up of part-time soldiers sometimes known as the SAS(R)(7). The 22nd Special Air Service is the full time regiment, based at Credenhill in Hereford, England they are the main focus of this