The Assistant Chief of the Air Staff (ACAS) is a senior appointment in the Royal Air Force

Royal Air Force

The Royal Air Force is the aerial warfare service branch of the British Armed Forces. Formed on 1 April 1918, it is the oldest independent air force in the world...

. 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

Air Vice-Marshal

Air vice-marshal is a two-star air-officer rank which originated in and continues to be used by the Royal Air Force. The rank is also used by the air forces of many countries which have historical British influence and it is sometimes used as the English translation of an equivalent rank in...

 assistant chiefs. In 1992, ACAS became a member of the Air Force Board

Air Force Board

The Air Force Board of the Defence Council is responsible for the management of the Royal Air Force.Prior to the creation of the current UK Ministry of Defence in 1964, the administration of the RAF and its personnel was undertaken by the Air Force Council, part of the Air Ministry...

. One of the many duties of the ACAS is to sit on the board of the Civil Aviation Authority

United Kingdom Civil Aviation Authority

The Civil Aviation Authority is the public corporation which oversees and regulates all aspects of aviation in the United Kingdom. The CAA head office is located in the CAA House on Kingsway in Holborn, London Borough of Camden...

.

Assistant chiefs of the air staff

• 1985 - 1986 A G Skingsley
• 1987 - 1989 M G Simmons
• 1989 - 1991 C J Thomson
  John Thomson (RAF)
  Air Chief Marshal Sir Charles John Thomson GCB, CBE, AFC usually Sir John Thomson was a senior officer in the Royal Air Force.-RAF service:...
  
  
• 1991 - 1992 T Garden
  Timothy Garden, Baron Garden
  Air Marshal Timothy Garden, Baron Garden, KCB, FRAeS, FRUSI, FCGI was a senior commander in the Royal Air Force and later became a university professor and a Liberal Democrat politician....
  
  
• 1992 – 1994 A J C Bagnall
  Anthony Bagnall
  Air Chief Marshal Sir Anthony John Crowther "Tony" Bagnall, GBE, KCB, FRAeS is a retired senior Royal Air Force officer and former Vice-Chief of the Defence Staff.- Flying career :...
  
  
• 1994 - 1996 P J Squire
• 1996 - 1998 T I Jenner
  Timothy Jenner
  Air Marshal Sir Timothy Ivo Jenner KCB, FRAeS, RAF , is a retired senior Royal Air Force commander who since retirement has worked for Serco Group.-RAF career:...
  
  
• 1998 - 2000 G E Stirrup
  Jock Stirrup
  Air Chief Marshal Graham Eric "Jock" Stirrup, Baron Stirrup, GCB, AFC, FRAeS, FCMI, RAF, is a former senior Royal Air Force commander, who was the Chief of the Defence Staff from 2006 until his retirement in late 2010. He is also a Crossbench member of the House of Lords.As a junior RAF officer,...
  
  
• 2000 - 2003 P O Sturley
  Philip Sturley
  Air Marshal Philip Oliver Sturley CB MBE BSc FRAeS RAF was a senior commander in the Royal Air Force. On 30 January 1998 Sturley took up the post of Air Officer Commanding No. 38 Group. From 2000 to 2003, Sturley was Assistant Chief of the Air Staff. In May 2005 he was appointed as President of...
  
  
• 2003 – 2005 D Walker
• 2005 - 2007 C H Moran
  Chris Moran
  Air Chief Marshal Sir Christopher Hugh "Chris" Moran, KCB, OBE, MVO, ADC, FRAeS , was a fast jet pilot and later a senior commander in the Royal Air Force...
  
  
• 27 April 2007 T M Anderson DSO
  Distinguished Service Order
  The Distinguished Service Order is a military decoration of the United Kingdom, and formerly of other parts of the British Commonwealth and Empire, awarded for meritorious or distinguished service by officers of the armed forces during wartime, typically in actual combat.Instituted on 6 September...
  
  
• 1 March 2010 B M North
  Barry North
  Air Vice-Marshal Barry 'Baz' Mark North OBE is a senior serving Royal Air Force officer and is currently Assistant Chief of the Air Staff, assuming this appointment on 1 March 2010.-RAF career:...