SAS. The Special Air Service or SAS is a regiment of the British Army constituted on 31 May 1950. It is part of the United Kingdom Special Forces (UKSF) and has served as a model for the special forces of many other countries all over the world. Special forces, or special operations forces, aremilitary units highly trained to perform unconventional, often high-risk missions. The SAS together with the Special Boat Service (SBS), Special Reconnaissance Regiment (SRR)
The Special Reconnaissance Regiment is a special reconnaissance unit of the British Army. It was established on 6 April 2005 and is part of the United Kingdom Special Forces (UKSF) under the command of Director Special Forces, alongside the Special Air Service (SAS), Special Boat Service (SBS) and the Special Forces Support Group (SFSG). The regiment conducts a wide range of classified activities related to covert surveillance and reconnaissance.