Assistant Chief of Air Staff (ACAS)


The incumbent is in practical terms the deputy to the head of the RAF, the Chief of the Air Staff.

The ACAS post was established in 1985 by eliminating the Vice Chief of the Air Staff and combining the Policy and Operations two star assistant chiefs. In 1992, ACAS became a member of the Air Force Board. One of the many duties of the ACAS is to sit on the board of the Civil Aviation Authority.

Air Vice-Marshal Edward Stringer CBE MA BEng RAF

ACAS - avm stringerEdward Stringer joined the Royal Air Force via its University Cadetship scheme and an engineering degree from Liverpool University. After officer and flying training he was posted to the Jaguar Force where he became a Qualified Weapon Instructor and spent a tour at Boscombe Down in Operational Test and Evaluation.

He has completed many operational tours including the Gulf war of '91, the 'No Fly Zones' over Iraq and Bosnia between '91 and '03, and the recent counter-insurgency operations in Iraq and Afghanistan. Edward’s command tours include: OC 54(F) Squadron, when he was also the Jaguar Force Commander for Operation TELIC in Iraq in 2003; Station Commander RAF Leeming and, concurrently, Tornado F3 Force Commander; CO 904 Expeditionary Air Wing based at Kandahar, Afghanistan in 2008; Commandant Air Warfare Centre, from ’09 to ‘11, during which he was also the UK’s first Air Contingent Commander for Op UNIFIED PROTECTOR, the NATO Operation in Libya.

He has completed staff tours in the Air Warfare Centre, the Directorate of Operational Capability in the MOD, and as Assistant Director (Operations) in the Air Staff, also within the MOD. Edward was Head of Joint Capability in the Security Policy and Operations area of the MOD until his appointment to Washington as the UK Chief of Defence Staff’s Liaison Officer to the Chairman of the Joint Chiefs in Oct 2012. His military education includes advanced staff college in Canada in '99, the Higher Command and Staff Course in the UK in '06, the USAF’s CFACC course at Maxwell AFB, and the Royal College of Defence Studies in ‘09. He completed an MA in International Relations at Kings College London in 2010 and undertook a Slessor Fellowship at Oxford University, researching Pol/Mil relations and strategy-making. Edward was appointed as the Assistant Chief of the Air Staff on 5 Apr 2013

Awards include the MBE in 2000, the OBE in 2003 and the CBE in 2009. Edward is married to Louise, a GP in Yorkshire, where the family of two children are at school.


Combat Aircraft


Typhoon Aircraft

A multi-role combat aircraft, capable of being deployed in the full spectrum of air operations.

Lightning II

Aircraft: F35 (Joint Strike Fighter)

The UK MOD has taken delivery of its first Lockheed Martin F-35B Joint Strike Fighter.


13Sqn's Tornado.

The Tornado GR4 is a variable geometry, two-seat, day or night, all-weather attack aircraft.

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