UK Special Forces (Reserve)



21 & 23 SAS are an integrated part of the United Kingdom Special Forces (UKSF) group comprising regular and reserve units, operating at the strategic and operational level. They operate in difficult and often changing circumstances, where the requirement for maturity and sound judgement is paramount.



21 & 23 SAS processes applications from male and female applicants, with no previous military service. Applicants must be no older than 42 years 6 months when applying to join the Army Reserves (AR). They will then be sponsored out to their recommended local AR unit to complete basic training and gain experience before being allowed to attempt SAS Reserves Selection.

Ex Regular and AR applicants must be no older than 43 years 364 days on weekend 1, of the Selection Induction Weekend (SIW) of SAS(R) Selection.

Applicants must be able to commit to intense and extended training demands and be willing to deploy overseas and commit to operations.


  1. Selection Induction Weekend
  2. Training Delivery
  3. Briefing Assessment Course
  4. Aptitude
  5. Standard Operating Procedures and Tactics Course
  6. Progressive training
  1. Selection Induction Weekend (SIW)

    The SIW consists of a number of physical and theory summative assessments to ensure that candidates are of a suitable standard to attempt selection and commence the pathway to serve in UKSF.

  2. Training Delivery

    Training Delivery (TD) is a progressively arduous course of drill nights and weekends over several months, requiring a candidate to demonstrate mental and physical robustness. It is designed to prepare applicants for the rigours of the Briefing Assessment Course (BAC) and Aptitude phase.

  3. Briefing Assessment Course

    The BAC is an arduous 4-day assessment phase that briefs on the qualities and standards required for service within UKSF and conducts an initial assessment of candidates’ suitability for continued progression on the selection pathway.

  4. Aptitude

    Aptitude consists of a series of progressive marches against the clock, which culminates with a testing endurance march over arduous terrain . The purpose of Aptitude is twofold, it allows a candidate to demonstrate their physical and mental resilience under arduous conditions. While providing the Directing Staff (DS) an insight to the applicant’s motivation for wanting to serve in UKSF(R).

  5. Standard Operating Procedures and Tactics Course

    On passing Aptitude, applicants will undertake a further six months training, over drill nights and weekends. This is an intensive period of instruction and assessment on Special Forces tactics, techniques and procedures, military skills form a major part of the programme. This is progressive, with the emphasis on individuals assimilating new skills, while under physical and mental pressure. On successful completion of the two-week final assessment exercise, applicants will be badged as SAS soldiers.

  6. Progressive training

    Following the completion of UKSF(R) Selection course, soldiers will enter a 36 -month period of probation which will require the completion of a basic parachute course, a communication course and a Survive, Escape, Resist and Evade (SERE) course. On completion of the probationary period, soldiers will be eligible to be mobilised and deployed on operations. Training and skill development will be continuous throughout an SAS soldier’s career, reflecting the requirement to maintain a high level of proficiency in a diverse range of skills.

On successful completion of basic training the starting daily rate for an SAS Trooper is over £112 per day plus all the usual Reserve service incentives. Which includes an annual tax-free bounty, paid leave and pension.

Support Staff
21 & 23 SAS Support Sqn staff are not required to pass Selection; however, they must maintain a high level of fitness and commitment. Male and female applicants willing to transfer from other units Regular or Army Reserve should be aged 18 to 51 years and 364 days, have their Security Clearance in-place and hold full trade qualifications (Class 2 minimum) in their respective trades. The specific trades require you to have previously served or are currently serving within the armed forces. We do not accept Direct Entrants into the support roles.

• RLC Driver, Chef, Storeman
• RAMC RMO, Medic (CMT1)
• R Sigs Comm Sys Operator/Driver
• AGC (SPS) Clerk
• Int Corps Analyst
• REME Vehicle Mechanics and Armourers

Support Staff are a vital part of 21 & 23 SAS and are valued members of UKSF(R). They offered the same opportunities to mobilise and deploy in support of their SAS counterparts .


21 & 23 SAS provide an opportunity for soldiers to work within a unique, diverse and exciting organisation with evolving operational roles. Service is physically and intellectually challenging, but the rewards are significant.

We are looking for self-motivated individuals with leadership potential and the ability to influence and serve on operations. In addition to a strong sense of purpose embracing the challenges of a complex world, 21 & 23 SAS provide challenge and adventure.

21 & 23 SAS units are located across the UK. To submit your initial enquiry of interest contact your nearest location, using the listed telephone points of contact or emails below.

21 SAS (R)

• London and South East
• Wales
• M3/M4 Corridor
• East Anglia
• South West

23 SAS (R)

• West Midlands
• North East
• North West
• Scotland (Lowland)
• Scotland (Highland)