Air of Authority - A History of RAF Organisation
Department of the Chief of the Air Staff
[CAS | DCAS | VCAS | ACAS (General) | ACAS (Policy) | ACAS (Ops) | ACAS | ACAS (Intelligence) | ACAS (Training) | ACAS (OR) | ACAS (Signals)]
Details of the duties and responsibilities of the holders of these appointments and those of the subordinate Directorates, etc can be found in the Members' Area under 'AM Distribution of Duties'
| 3 Jan 1918 | Post established on Air Council |
| 3 Jan 1918 | Maj-Gen Sir Hugh Trenchard |
| 13 Apr 1918 | Maj-Gen Sir Frederick Sykes |
| 22 Jan 1919 | AM-MRAF Sir Hugh Trenchard |
| 1 Jan 1930 | ACM-MRAF Sir John Salmond |
| 1 Apr 1933 | ACM Sir Geoffrey Salmond |
| 28 Apr 1933 | MRAF Sir John Salmond (acting) |
| 22 May 1933 | ACM-MRAF Sir Edward Ellington |
| 1 Sep 1937 | ACM-MRAF Sir Cyril Newall |
| 25 Oct 1940 | ACM-MRAF Sir Charles Portal |
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1 Jan 1946 |
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1 Jan 1950 |
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1 Jan 1953 |
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1 Jan 1956 |
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1 Jan 1960 |
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1 Sep 1963 |
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1 Apr 1967 |
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1 Apr 1971 |
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1 Apr 1974 |
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| 7 Aug 1976 | |
| 10 Aug 1977 | |
| 15 Oct 1982 | |
| 15 Oct 1985 |
ACM Sir David Craig |
| 14 Nov 1988 | |
| 6 Nov 1992 | |
| 10 Apr 1997 |
ACM Sir Richard Johns |
| 21 Apr 2000 | ACM Sir Peter Squire |
| 1 Aug 2003 | ACM Sir Jock Stirrup |
| 13 Apr 2006 | ACM Sir Glenn Torpy |
| 31 Jul 2009 | ACM Sir Stephen Dalton |
| xx Jul 2013 | ACM Sir Andrew Pulford |
| xx Jul 2016 | ACM Sir Stephen Hillier |
| 25 Jul 2019 | ACM Sir Michael Wigston |
| 2 Jun 2023 | ACM Sir Rich Knighton |
| 29 Aug 2025 | ACM Sir Harvey Smyth |
CAS controlled the following Directorates -
Directorate of Flying Operations (1918 - 1919, retitled Directorate of Deputy Chief of the Air Staff)
Deputy Directorate of Air Intelligence (1918 - 1919, retitled Directorate of Deputy Chief of the Air Staff)
Directorate of Air Organisation (1918 - 1919, absorbed into Directorate of Training and Organisation)
Deputy Directorate of Organisation (1918 - 1919, absorbed into Directorate of Air Organisation)
Directorate of the Deputy Chief of the Air Staff (1919 - Sep 1919, renamed Directorate of Operations and Intelligence)
Directorate of Training and Organisation (1919 - 1923, renamed Directorate of Training and Staff Duties)
Directorate of Operations and Intelligence (Sep 1919 from Directorate of the Deputy Chief of the Air Staff - xxx 1924, transferred to DCAS)
Directorate of Personnel (1919 - 1923, transferred to Air Member for Personnel)
Directorate of Equipment (1919 - 1923, transferred to Air Member for Supply and Research)
Directorate of Works and Buildings (1919 downgraded from Department - 1935, transferred to Department of AMSO)
Directorate of Demobilisation (1919 transferred from Finance Member Department - 1919, abolished)
Directorate of RAF Medical Services (1919 transferred from MGP - 1923 transferred to AMP)
Directorate of Training and Staff Duties (1923 renamed from Directorate of Training and Organisation - 1924)
Controllerate of Communications (1923 - 1924, renamed Signals Branch)
Directorate of Organisation and Staff Duties (1924 from Directorate of Training and Staff Duties
Signals Branch (1924 from Controllerate of Communications - 1936, renamed Directorate of Signals)
Directorate of Organisation (1934 from Organisation and Staff Duties - 1935, transferred to Department of AMSO)
Directorate of Staff Duties (1934 from Organisation and Staff Duties - Nov 1938, transferred to ACAS)
Directorate of Signals (1936, renamed from Signals Branch - Nov 1938, transferred to ACAS)
Directorate of Military Co-operation (May 1940, transferred from ACAS (Operations and Intelligence) - Jul 1940)
Directorate of Plans (May 1940, transferred from ACAS (Operations and Intelligence) - May 1942, transferred to ACAS (Policy))
Directorate of Military Co-operation (Nov 1940 - Jun 1943)
Directorate-General of Signals (Sep 1941, transferred from ACAS (Radio) - xxx 1950, transferred to ACAS Technical Requirements)
Directorate of Signals (Sep 1941, transferred from ACAS (Radio) - xxx 1950, transferred to ACAS Technical Requirements)
Directorate of Telecommunications (Sep 1941, transferred from ACAS (Radio) - xxx 1946)
Directorate of Radio (Sep 1941, transferred from ACAS (Radio) - May 1942, renamed Directorate of RDF)
Directorate of RDF (May 1942, renamed from Directorate of Radio - Jun 1943, renamed Directorate of Radar)
Directorate of Ground Defence (xxx 1946, transferred from ACAS (General) - xxx 1946, renamed Commandant General of the RAF Regiment and Inspector of Ground Combat Training)
Controller of Communications (Feb 1943 - xxx 1946)
Directorate of Radar (Jun 1943, renamed from Directorate of RDF - xxx 1946, renamed Directorate of Radio)
Air Ministry War Room (Jan 1945, transferred from ACAS (General) - xxx 1945, transferred to DCAS)
Directorate of Radio (xxx 1946, renamed from Directorate of Radar - - xxx 1948, transferred to AMTS)
Directorate-General of Armament (xxx 1946, transferred from ACAS (Technical Requirements) - xxx 1947 - xxx 1948, transferred to ACAS (Training)/AMTS)
Commandant General of the RAF Regiment and Inspector of Ground Combat Training (xxx 1946, renamed from Directorate of Ground Defence - xxx 1949, transferred to ACAS (Training)
Deputy Directorate of Science (xxx 1946, transferred from ACAS (Operations) - xxx 1947)
Directorate of Weapons (xxx 1948 - xxx 1953)
Directorate of Navigation and Control (xxx 1950, transferred to ACAS (Operations) - xxx 1953)
Directorate of Flight Safety (Jun 1955 - xxx 1964, transferred to ACAS (OR)
Directorate of Exercise Plans (Jan 1959 - xxx 1960)
Defence Research Policy Staff (xxx 1963 - xxx 1964)
Directorate of Air Staff Briefing (xx xxx 1964, transferred ACAS (Operations) - Jan 1985)
Air Commodore Intelligence (xxx 1965, transferred from ACAS (Intelligence) - xxx 1979, transferred to ACAS (Operations))
Directorate of Security (RAF) (xxx 1965, transferred from ACAS (Intelligence) - xxx 1968, renamed Directorate of RAF Provost and Security Services)
Directorate of RAF Flying Training (xxx 1966, transferred from ACAS (Training) - xxx 1968, transferred to AMP)
Assistant Directorate of Training Plans (RAF) (xxx 1966, transferred from ACAS (Training) - xxx 1968, transferred to AMP)
Controller of National Air Traffic Control Services (Apr 1966 - xxx 1973, renamed Controllerate of National Air Traffic Services)
Directorate of Signals (Air) (xxx 1968, transferred from AMSO - xxx 1979, transferred to ACAS (Operations) - Jan 1985, transferred to AMSO)
Directorate of RAF Provost and Security Services (xxx 1968, renamed from Directorate of Security (RAF) - xxx 1970, transferred to AMP)
Controllerate of National Air Traffic Services (xxx 1979, transferred from ACAS (OR) - xxx 1991, renamed National Air Traffic Services)
Directorate of Air Staff Briefing and Co-ordination (Jan 1985 - xxx 1996, renamed Directorate of Air Staff)
Directorate of Air Offensive (Jan 1985 - xxx 1996, transferred to AOC-in-C, Strike Command)
Directorate of Air Defence (Jan 1985 - xxx 1996, transferred to AOC-in-C, Strike Command)
Directorate of Air Support (Jan 1985 - xxx 1985, renamed Directorate of Air Force Staff Duties)
Directorate of Air Force Staff Duties (xxx 1985, renamed from Directorate of Air Support - xxx 1996)
Head of Secretariat (Air Staff) (Jan 1985 - xxx 2002)
Inspector of RAF Flight Safety (RAF) (Jan 1985 - xxx 2002, transfered to Defence Aviation Safety Centre)
Directorate of RAF Public Relations (Jan 1985 - xxx 1994, transferred to Defence Staff)
National Air Traffic Services (xxx 1991, renamed from Controllerate of National Air Traffic Services - xxx 1996, renamed Military Air Traffic Organistion)
Director of Security and Provost Marshal (RAF) (xxx 1990, transferred from CG RAFR - xxx 1996, transferred to AOC-in-C, Strike Command)
Directorate of Air Staff ( xxx 1996, renamed Directorate of Air Staff Briefing and Co-ordination -
Deputy Chief of the Air Staff (Director of Operations and Intelligence)
| 3 Jan 1918 | Post established on Air Council |
| 3 Jan 1918 | Maj-Gen M E F Kerr |
| 1 Apr 1918 | Post removed from Air Council |
| 1 Apr 1918 | Brig-Gen R M Groves |
| xx xxx xxxx | Brig-Gen O Swann |
| xx Sep 1919 | Post retitled Director of Operations and Intelligence |
| xx xxx 1920 | A/Cdre J M Steel |
| xx xxx 1924 | Director of Operations and Intelligence assumed duties of DCAS |
| 12 Apr 1926 | A/Cdre C L N Newall |
| 1 Jan 1930 | Post re-appointed to the Air Council |
| 6 Feb 1931 | A/Cdre C S Burnett |
| 1 Feb 1933 | AVM E R Ludlow-Hewitt |
| 26 Jan 1935 | AVM C L Courtney |
| 25 Jan 1937 | AVM R E C Peirse |
| 22 Apr 1938 | AVM W S Douglas |
| xx Jan 1940 | Subordinate Directorates transferred to ACAS (OR & T) & ACAS (Ops and Int) |
| 25 Nov 1940 | AVM A T Harris |
| 1 Jun 1941 | AVM N H Bottomley |
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3 May 1942 |
Duties assumed by ACAS (Ops) |
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30 Jul 1943 |
Post re-established |
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30 Jul 1943 |
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xx Sep 1945 |
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xx Jun 1946 |
Post abolished |
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4 Feb 1948 |
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1 Nov 1948 |
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17 Mar 1952 |
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1 Nov 1952 |
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9 Nov 1953 |
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4 Jul 1956 |
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15 Nov 1959 |
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18 Jul 1960 |
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5 Jun 1963 |
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1 Apr 1966 |
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30 Jan 1967 |
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xx xxx 1968 |
Post abolished |
DCAS controlled the following Directorates -
Directorate of Operations and Intelligence (1924 - Feb 1939)
Deputy Directorate of Plans* (upgraded to Directorate of Plans - Feb 1939)
Deputy Directorate of Operations* (Sub-divided in Nov 1938, re-established - Feb 1939)
Deputy Directorate of Operational Requirements* (Nov 1938, transferred to ACAS)
Deputy Directorate of Intelligence* (upgraded to Directorate of Intelligence - Feb 1939)
Deputy Directorate of Operations (Home) (Nov 1938, established from part of Deputy Directorate of Operations - Oct 1939, upgraded to Directorate)
Deputy Directorate of Operations (Overseas) (Nov 1938, established from part of Deputy Directorate of Operations - Oct 1939, upgraded to Directorate)
Deputy Directorate of Operations (Naval Co-operation) (Nov 1938, established from part of Deputy Directorate of Operations - Oct 1939, upgraded to Directorate)
Director of General of Operations (Oct 1939 - Jan 1940, transferred to ACAS (Operations and Intelligence))
Directorate of Operations (Home) (Oct 1939, upgraded from Deputy Directorate - Jan 1940, transferred to ACAS (Operations and Intelligence))
Directorate of Operations (Overseas) (Oct 1939, upgraded from Deputy Directorate - Jan 1940, transferred to ACAS (Operations and Intelligence))
Directorate of Operations (Naval Co-operation) (Oct 1939, upgraded from Deputy Directorate - Jan 1940, transferred to ACAS (Operations and Intelligence))
Directorate of Plans (Feb 1939, upgraded from Deputy Directorate - Jan 1940, transferred to ACAS (Operations and Intelligence))
Directorate of Intelligence (Feb 1939, upgraded from Deputy Directorate - Jan 1940, transferred to ACAS (Operations and Intelligence))
Directorate of Operations (Home) (May 1940, transferred from ACAS (Operations and Intelligence) - Feb 1941, split into Bomber and Fighter Operations)
Directorate of Operations (Overseas) (May 1940, transferred from ACAS (Operations and Intelligence) - Jun 1942, renamed Directorate of Overseas Operations)
Directorate of Operations (Naval Co-operation) (May 1940, transferred from ACAS (Operations and Intelligence) - May 1942, transferred to ACAS (Operations))
Directorate of Military Co-operation (May 1940, transferred from ACAS (Operations and Intelligence) - Jul 1940)
Directorate-General of Aircraft Safety (Oct 1941 - May 1942, transferred to ACAS (Operations))
Deputy Directorate of Aircraft Safety (Oct 1941 - May 1942, transferred to ACAS (Operations))
Deputy Directorate of Air/Sea Rescue (Oct 1941 - May 1942, transferred to ACAS (Operations))
Air Ministry War Room (xxx 1945, transferred from CAS - xxx 1945)
*These began being shown separately from April 1938
| 22 Apr 1940 | Post established on Air Council |
| 22 Apr 1940 | AM Sir Richard Peirse |
| 4 Oct 1940 - 1942 | ACM Sir Wilfred Freeman |
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21 Mar 1943 |
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xx xxx 1946 |
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xx xxx 1947 |
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1 Nov 1948 |
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1 Mar 1950 |
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1 Mar 1952 |
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1 Nov 1952 |
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16 Sep 1957 |
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| xx xxx 1959 | Post abolished |
| 1 Mar 1961 | Post re-established |
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2 Mar 1962 |
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9 Nov 1964 |
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6 Nov 1967 |
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1 Aug 1970 |
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1 Nov 1973 |
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14 Feb 1976 |
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25 Mar 1977 |
AM Sir Peter Terry |
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30 Jan 1979 |
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3 May 1980 |
AM Sir David Craig |
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28 Aug 1982 |
AM Sir Peter Harding |
| xx xxx 1984/85 | Post abolished |
VCAS was not directly responsible for the control of any Directorates
Assistant Chief of the Air Staff
| 17 Feb 1938 | Post established as ACAS |
| 17 Feb 1938 | AVM W S Douglas |
| 1 Mar 1939 | AVM R H Peck |
| xx Jan 1940 | Post split into ACAS (OR & T) & ACAS (Ops and Int) |
ACAS (General) controlled the following Directorates -
Assistant Chief of the Air Staff (Policy)
Assistant Chief of the Air Staff (Policy & Planning)
| 6 Apr 1942 | Renamed ACAS (Planning) |
| 5 May 1942 | AVM J C Slessor |
| 5 May 1942 | Renamed ACAS (Policy) |
| 5 May 1942 | AVM J C Slessor |
| xx Feb 1943 | AVM C E H Medhurst |
| xx Aug 1943 | AVM Douglas Colyer |
| 21 Dec 1944 | AVM Sir William Dickson |
| xx Jun 1946 | AVM Sir William Elliott |
| 24 Feb 1947 | AVM R M Foster |
| 1 Aug 1949 | AVM Douglas Macfadyen |
| 9 Jan 1952 | AVM W L Dawson |
| 12 June 1953 | AVM Thomas G. Pike |
| 22 Sep 1953 | AVM C E Chilton |
| 1 Mar 1955 | AVM A Earle |
| 1 May 1957 | AVM J N T Stephenson |
| xx xxx 1959 | Directorates transferred to ACAS (Operations) |
| 4 Feb 1963 | Post re-established as ACAS (Policy and Planning) |
| 4 Feb 1963 | AVM T O Prickett |
| 1 Apr 1964 | Post reverted ACAS (Policy) |
| 1 Apr 1964 | AVM P C Fletcher |
| 11 Oct 1965 | AVM F D S Scott-Malden |
| 1 Mar 1966 | AVM L D Mavor |
| 15 Feb 1969 | AVM A McK S Steedman |
| 1 May 1971 | AVM P de L Le Cheminant |
| 14 Sep 1972 | AVM A C Davies |
| 27 Jul 1974 | AVM W J Stacey |
| 8 Nov 1975 | AVM J A Gilbert |
| 13 Aug 1977 | AVM J M D Sutton |
| 15 Dec 1979 | AVM P B Hine |
| 15 Mar 1983 | AVM F G D Clark |
| 17 Aug 1984 | AVM A G Skingsley |
| 2 Jan 1985 | Duties assumed by ACAS |
ACAS (Policy) controlled the following Directorates -
Directorate of Staff Duties (xxx 1946, transferred from ACAS (General) -xxx 1947)
Directorate of Policy (Air Staff) (xxx 1946, amalgamation of Directorate of Policy (Air) and Directorate of Policy (General) - xxx 1956, renamed Directorate of Policy (Air Staff) (A))
Air Staff Policy (xxx 1946, renamed from Air Staff Policy I - xxx 1947)
Deputy Directorate of Allied Air Co-operation and Foreign Liaison (xxx 1946, downgraded from Deputy Directorate - xxx 1947, transferred to ACAS (Intelligence)
Directorate of NATO Affairs (xxx 1953 - xxx 1956, renamed Directorate of Policy (Air Staff) (B)
Directorate of Policy (Air Staff) (A) (xxx 1956, renamed from Directorate of Policy (Air Staff) - xxx 1958, renamed Directorate of Air Staff Plans and Programmes)
Directorate of Policy (Air Staff) (B) (xxx 1956, renamed from Directorate of NATO Affairs - xxx 1958, renamed Directorate of Air Staff Briefing)
Directorate of Joint Plans (xxx 1958, renamed from Directorate of Plans)
Directorate of Air Staff Plans and Programmes (xxx 1958, renamed from Directorate of Policy (Air Staff) (A) -
Directorate of Air Staff Briefing (xxx 1958, renamed from Directorate of Policy (Air Staff) (B) -
Directorate of Defence Plans (Air) (xxx 1964 - 1969)
Directorate of Air Staff Plans and Programmes (xxx 1964, transferred from ACAS (Operations) - xxx 1968, renamed Directorate of Air Staff Plans)
Directorate of Air Staff Plans (xxx 1968, renamed from Directorate of Air Staff Plans and Programmes - Jan 1985)
Directorate of Forward Policy (xxx 1971 - Jan 1985)
Deputy Directorate NATO and Command and Control (xxx 1981 - xxx 1983)
Assistant Chief of the Air Staff (Operations and Intelligence)
| xx Jan 1940 | Post established as Assistant Chief of the Air Staff (Operations and Intelligence) |
| xx Jan 1940 | AVM R H Peck |
| xx May 1940 | Post renamed ACAS (General) |
ACAS (Operations and Intelligence) controlled the following Directorates -
Directorate-General of Operations (Jan 1940, transferred from DCAS - May 1940 renamed DCAS)
Directorate of Operations (Home) (Jan 1940, transferred from DCAS - May 1940, transferred to DCAS)
Directorate of Operations (Overseas) (Jan 1940, transferred from DCAS - May 1940, transferred to DCAS)
Directorate of Operations (Naval Co-operation) (Jan 1940, transferred from DCAS - May 1940, transferred to DCAS)
Directorate of Plans (Jan 1940, transferred from DCAS - May 1940, transferred to CAS)
Directorate of Signals (Jan 1940, transferred from CAS - May 1940, transferred to ACAS (General))
Directorate of Military Co-operation (Jan 1940 - May 1940, transferred to DCAS)
Assistant Chief of the Air Staff (General)
| xx May 1940 | AVM-AM R H Peck |
| xx Jul 1940 | Subordinate Directorate transferred to ACAS (Radio) |
| xx Sep 1940 |
Resumed control of a
Subordinate Directorate ACAS (General) was not directly responsible for the control of any Directorates |
| xx Feb 1942 |
Subordinate Directorate
transferred to DCAS ACAS (General) was not directly responsible for the control of any Directorates |
| xx May 1942 | Resumed control of a Subordinate Directorate |
| xx xxx 1946 | Post abolished |
ACAS (General) controlled the following Directorates -
Directorate of Signals (May 1940, transferred from ACAS (Operations and Intelligence) - Jul 1940, transferred ACAS (Radio))
Directorate of Ground Defence (Sep 1940, transferred from DCAS - Feb 1942, transferred to DCAS)
Directorate-General of Ground Defence (May 1942, transferred from DCAS - xxx 1946, transferred to CAS)
Deputy Directorate of Counter Propaganda (Jan 1943 - xxx 1945)
Directorate of Aircraft Safety (Aug 1943, transferred from ACAS (Operations - Apr 1944, renamed Directorate of Flying Control and Rescue)
Deputy Directorate of Aircraft Safety (Aug 1943, transferred from ACAS (Operations - Apr 1944)
Deputy Directorate of Air/Sea Rescue (Aug 1943, transferred from ACAS (Operations - Jan 1945, absorbed into Directorate of Navigation)
Directorate of Air Tactics (Aug 1943, transferred from ACAS (Operations) - Jan 1945, transferred to ACAS (Operations))
Directorate of Flying Control and Rescue (Apr 1944, renamed from Directorate of Aircraft Safety - Jan 1945, absorbed into Directorate of Navigation)
Deputy Directorate of Science (? - Jan 1945, transferred to ACAS (Operations))
Air Ministry War Room (? - Jan 1945, transferred to CAS)
Directorate of Staff Duties (xx 1945 - xxx 1946, transferred to ACAS (Policy))
Assistant Chief of the Air Staff (Operations)
| 3 May 1942 | Post established by renaming DCAS |
| 3 May 1942 | AVM N H Bottomley |
| xx Aug 1943 | AVM W A Coryton |
| 1 Aug 1944 | AVM T M Williams |
| xx xxx 1947 | AVM J D I Hardman |
| 6 Dec 1948 | AVM C E N Guest |
| 19 Apr 1952 | AVM Sir Harry Broadhurst |
| 4 Nov 1953 | AVM L F Sinclair |
| 24 Aug 1955 | AVM R B Lees |
| 17 Oct 1958 | AVM John Grandy |
| 7 Dec 1960 | AVM T O Prickett |
| 4 Feb 1963 | AVM D G Smallwood |
| 22 Nov 1965 | AVM L M Hodges |
| 1 May 1968 | AVM B P T Horsley |
| 2 Dec 1970 | AVM D G Evans |
| 13 Jan 1973 | AVM R L Wade |
| 1 Nov 1973 | AVM W E Colahan |
| 22 Mar 1975 | AVM D B Craig |
| 6 May 1978 | AVM D C A Lloyd |
| 20 Dec 1980 | AVM K W Hayr |
| 10 Jul 1982 | AVM J W Price |
| 1 Jun 1984 | AVM L A Jones |
| 2 Jan 1985 | Duties assumed by ACAS |
ACAS (Operations) controlled the following Directorates -
Directorate of Operations (Overseas) (May 1942, transferred from DCAS - Jun 1942, renamed Directorate of Overseas Operations)
Directorate of Operations (Naval Co-operation) (May 1942, transferred from DCAS - Aug 1943, split into Directorate of Operations (Anti-U-boat) and Directorate of Operations (Anti-Ship))
Directorate-General of Aircraft Safety (May 1942, transferred from DCAS - Jan 1943, downgraded to a Directorate)
Deputy Directorate of Aircraft Safety (May 1942, transferred from DCAS - Aug 1943, transferred to ACAS (General))
Deputy Directorate of Air/Sea Rescue (May 1942, transferred from DCAS - Aug 1943, transferred to ACAS (General))
Directorate of Aircraft Safety (Jan 1943, downgraded from Directorate-General - Aug 1943, transferred to ACAS (General))
Directorate of Overseas Operations (Jun 1942, renamed from Directorate of Operations (Overseas) - xxx 1946, absorbed into Directorate of Operations)
Directorate-General of Ground Defence (Jan 1945, transferred to ACAS (General) - xxx 1946 transferred to CAS)
Deputy Directorate of Science (Jan 1945, transferred from ACAS (Intelligence) - xxx 1946, transferred to CAS)
Deputy Directorate of Photography (xxx 1946, transferred from ACAS (Technical Requirements) - xxx 1946)
Directorate of Air Support and Transport Operations (xxx 1946 - xxx 1948)
Assistant Chief of the Air Staff (Operational Requirements & Tactics)
| 17 Feb 1938 | Post established as ACAS (Operational Requirements and Tactics) |
| 17 Feb 1938 | AVM W S Douglas |
| 22 Apr 1940 | AVM R H M S Saundby |
| 18 Nov 1940 | AVM J O Andrews |
| 4 Feb 1941 | AVM F J Linnell |
| 5 Jun 1941 | AVM R S Sorley |
| xx Jun 1942 | Post retitled ACAS (Technical Requirements) |
Assistant Chief of the Air Staff (Technical Requirements)
| xx Jun 1942 | Post retitled from ACAS (Operational Requirements and Tactics) |
| xx Jun 1942 | AVM R S Sorley |
| xx Apr 1943 | AVM J D Breakey |
| 2 Jul 1945 | AVM J N Boothman |
| 17 Aug 1948 | AVM C B R Pelly |
Assistant Chief of the Air Staff (Operational Requirements)
| 17 Sep 1951 | Post retitled from ACAS (Technical Requirements) |
| 17 Sep 1951 | AVM G W Tuttle |
| 6 Aug 1954 | AVM H V Satterly |
| 1 Feb 1957 | AVM H J Kirkpatrick |
| 24 Jul 1957 | Vacant |
| 1 Sept 1957 | AVM W H Kyle |
| 21 Sept 1959 | AVM R N Bateson |
| 1 Jan 1961 | AVM C H Hartley |
| xx Apr 1963 | AVM R H E Emson |
| 1 Apr 1966 | AVM W D Hodgkinson |
| 29 Jul 1968 | AVM K C M Giddings |
| 15 May 1971 | AVM D C Lowe |
| 23 Jan 1973 | AVM D Bower |
| 7 Dec 1974 | AVM G C Cairns |
| 20 Mar 1976 | AVM J M Nicholls |
| 17 Sep 1977 | AVM D P Hall |
| 26 Jan 1980 | AVM D Harcourt-Smith |
| 21 Jan 1984 | AVM M K Adams |
| 2 Jan 1985 | Duties transferred to ACDS (Air Systems) |
This post under its various titles controlled the following Directorates -
Directorate of War Training and Tactics (Jan 1940, renamed from Directorate of Staff Duties - May 1940)
Directorate of Operational Requirements (May 1940 - xxx 1946, split into Directorates of Operational Requirements (I) and (II) -
Deputy Directorate of Air Tactics (May 1940 -Apr 1941, transferred to DCAS)
Deputy Directorate of Photography (Apr 1941, transferred from ACAS (General) - xxx 1946, transferred to ACAS (Operations)
Directorate of Armament Requirements (Jan 1944 - xxx 1946, transferred to CAS)
Directorate-General of Armament (Feb 1945 - xxx 1946, transferred to CAS)
Directorate of Weapons (xxx 1948, transferred from CAS - xxx 1950, transferred to ACAS (Technical Requirements)
Directorate-General of Signals (Jun 1941, renamed from ACAS (Radio) - xxx 1950, transferred to ACAS Technical Requirements)
Directorate of Signals (Sep 1941 - xxx 1950, transferred to ACAS Technical Requirements)
Directorate of Operational Requirements (A) (xxx 1951 - xxx 1964, renamed Directorate of Operational Requirements (1) (RAF))
Directorate of Operational Requirements (B) (xxx 1951 - xxx 1964, renamed Directorate of Operational Requirements (2) (RAF))
Directorate of Operational Requirements (C) (Jul 1955 - xxx 1964, renamed Directorate of Operational Requirements (3) (RAF))
Directorate of Flight Safety (xxx 1964, transferred from CAS - xxx 1964, renamed Directorate of RAF Flight Safety)
Directorate of Operational Requirements (1) (RAF) (xxx 1964, renamed from Directorate of Operational Requirements (A) - xxx 1976, renamed Directorate of Aircraft Requirements (RAF))
Directorate of Operational Requirements (2) (RAF) (xxx 1964, renamed from Directorate of Operational Requirements (B) - xxx 1976, renamed Directorate of Systems and Weapons Requirements (RAF))
Directorate of Operational Requirements (3) (RAF) (Jul 1955 - xxx 1964, renamed from Directorate of Operational Requirements (C) - xxx 1976)
Directorate of (RAF) Flight Safety (xxx 1964, transferred from CAS - xxx 1964, renamed from Directorate of Flight Safety - xxx 1977, renamed Inspectorate of Flight Safety (RAF))
Assistant Directorate of Standardisation (RAF) (Apr 1965 -
Directorate of Aircraft Requirements (RAF) (DOR 1 (RAF)) (xxx 1976, renamed Directorate of Operational Requirements (1) (RAF) -
Directorate of Systems and Weapons Requirements (RAF) (DOR 2 (RAF)) (xxx 1976, renamed from Directorate of Operational Requirements (2) (RAF) - xxx 1983, renamed Directorate of Air Defence Systems and Weapons Requirements (RAF) (DOR 2 (RAF))
Inspectorate of Flight Safety (xxx 1977, renamed from Directorate of (RAF) Flight Safety - xxx 1979, transferred to ACAS (Operations))
Controllerate of National Air Traffic Services (xxx 1979, transferred from CAS -
Directorate of Air Defence Systems and Weapons Requirements (RAF) (DOR 2 (RAF) (xxx 1983, renamed from Directorate of Systems and Weapons Requirements (RAF) (DOR 2 (RAF) -
Assistant Chief of the Air Staff (Radio)
| xx Jul 1940 | Established from Director-General of Signals |
| xx Jul 1940 | AM Sir Philip Joubert de la Ferte |
| xx Jun 1941 | Post renamed Director-General of Signals |
Assistant Chief of the Air Staff (Signals)
| 30 May 1950 | Established from Director-General of Signals |
| 30 May 1950 | AVM E B Addison |
| 1 Mar 1952 | AVM L Dalton-Morris |
| xx xxx 1956 | AVM J G W Weston |
| 1 Feb 1959 | AVM G C Eveleigh |
| xx xxx 1961 | Reverted to Director-General of Signals |
ACAS (Policy) controlled the following Directorates -
Directorate of Signals (O) (May 1950 - xxx 1954, renamed Directorate of Signals (1))
Directorate of Signals (P) (May 1950 - xxx 1954, renamed Directorate of Signals (1))
Directorate of Signals (1) (xxx 1954, renamed from Directorate of Signals (O) - xxx 1961)
Directorate of Signals (2) (xxx 1954, renamed from Directorate of Signals (P) - xxx 1961)
Assistant Chief of the Air Staff (Training)
| 1 Jan 1947 | Post established |
| 1 Jan 1947 | AVM B E Embry |
| 19 Oct 1948 | AVM S D Macdonald |
| 7 Nov 1950 | AVM T N McEvoy |
| 1 Oct 1953 | AVM the Earl of Bandon |
| 4 Jan 1956 | AVM Sir George Harvey |
| 1 Oct 1958 | AVM John Worrall |
| 13 Jul 1960 | AVM P D Holder |
ACAS (Training) controlled the following Directorates -
Directorate of Command and Staff Training (xxx 1947 transferred from AMTS - xxx 1961, transferred to Air Secretary)
Commandant General of the RAF Regiment and Inspector of Ground Combat Training (xxx 1949, transferred from CAS - xxx 1950, transferred to ACAS (Intelligence))
Directorate-General of Armament (xxx 1948, transferred from CAS, see also AMTS - xxx 1950)
Director of Ground Defence (xxx 1948 - xxx 1950, transferred to ACAS (Intelligence))
Directorate of Operational Training (Nov 1954 - xxx 1958)
Directorate of Ranges (Guided Weapons) (xxx 1955 - Sep 1957)
Directorate of Air Training (xxx 1958 - xxx 1961)
Directorate of Operational Training (xxx 1961 - xxx 1963)
Directorate of Flying Training (xxx 1961 - xxx 1964, renamed Directorate of RAF Flying Training)
Assistant Directorate of Training Plans (xxx 1963 - xxx 1964, renamed Assistant Directorate of Training Plans (RAF))
Directorate of RAF Flying Training (xxx 1964, renamed from Directorate of Flying Training - xxx 1966, transferred to CAS)
Assistant Directorate of Training Plans (RAF) (xxx 1964, renamed from Assistant Directorate of Training Plans - xxx 1966, transferred to CAS)
Assistant Chief of the Air Staff (Intelligence)
| 1 Mar 1941 | Post established from Directorate of Intelligence |
| 1 Mar 1941 | AVM C E H Medhurst |
| 19 Oct 1942 | AVM F F Inglis |
| xx Aug 1945 | AVM Sir Thomas Elmhirst |
| 6 Jan 1947 | AVM L F Pendred |
| 18 Jan 1950 | AVM N C Ogilvie-Forbes |
| 10 May 1952 | AVM F J Fressages |
| 8 Sep 1954 | AVM W M L MacDonald |
| 1 Aug 1958 | AVM S O Bufton |
| 14 Sep 1961 | AVM A Foord-Kelcey |
| 7 Dec 1964 | AVM H J Maguire |
| xx xxx 1965 | Post abolished |
ACAS (Intelligence) controlled the following Directorates -
Assistant Chief of the Air Staff
| 17 Feb 1938 | Post established |
| 17 Feb 1938 | AVM R P Willock |
| 1 Mar 1939 | AVM R H Peck |
| xx Jan 1940 | Post replaced by ACAS (Ops & Int) and ACAS (OR & Tactics) |
| 2 Jan 1985 | Post re-established |
| 2 Jan 1985 | AVM A G Skingsley |
| 13 Feb 1986 | AVM L A Jones |
| 2 Mar 1987 | AVM M G Simmons |
| xx Mar 1989 | AVM C J Thomson |
| 15 Mar 1991 | AVM T Garden |
| 14 Aug 1992 | AVM A J C Bagnall |
| 1 Sep 1994 | AVM P T Squire |
| 30 Sep 1996 | AVM T I Jenner |
| 3 Aug 1998 | AVM G E Stirrup |
| 1 Sep 2000 | AVM P O Sturley |
| 6 Oct 2003 | AVM D Walker |
| 22 Apr 2005 | AVM C H Moran |
| 15 Mar 2007 | AVM T M Anderson |
| 1 Mar 2010 | AVM B M North |
| 5 Apr 2013 | AVM E J Stringer |
| 23 Jan 2015 | AVM R J Knighton |
| 13 Mar 2017 | AVM M Wigston |
| xx Aug 2018 | AVM G M D Mayhew |
| 17 Apr 2019 | AVM I D Gale |
| 17 May 2021 | AVM S S Edwards |
| 17 May 2021 | AVM S S Edwards |
| xx Jun 2024 | AVM S A Marshall |
| xx Nov 2025 | AVM I J Townsend |
ACAS controlled the following Directorates -
Assistant Chief of the Air Staff (Air Defence)
|
2 Jan 1956 |
Post established |
|
2 Sep 1957 |
AVM D G Morris CB, CBE, DSO, DFC |
| xx xxx 1960 | Post abolished |
ACAS controlled the following Directorates -
Commandant General of the RAF Regiment and Inspector of Ground Combat Training
Director-General of Security (RAF) and Commandant General of the RAF Regiment
Director-General of Regiment and Security (RAF)
Commandant General of the RAF Regiment and Director-General of Regiment and Security (RAF)
|
xx Jan 1942 |
Post established |
|
xx Jan 1942 |
Maj-Gen Sir Claude Liardet |
|
xx xxx 1945 |
Maj-Gen A E Robinson |
|
30 Jun 1948 |
Commandant-General also became Inspector of Ground Combat Training |
|
30 Jun 1948 |
|
|
26 Oct 1950 |
|
|
1 Oct 1952 |
|
|
23 Sep 1954 |
|
|
12 Feb 1957 |
|
|
1 Mar 1959 |
AVM J H Harris |
| 5 Aug 1961 | AVM E M F Grundy |
| xx Jun 1962 | AVM K W Godfrey |
| 7 Jan 1963 | AVM Sir Bernard Chacksfield |
|
xx xxx 1964 |
|
|
3 May 1968 |
|
|
6 Jan 1973 |
|
|
3 May 1975 |
|
|
xx xxx 1976 |
|
|
28 May 1977 |
|
|
28 Apr 1979 |
|
|
4 Aug 1983 |
|
|
2 Jan 1985 |
Transferred to AMSO |
ACAS controlled the following Directorates -
Director of Ground Defence (xxx 1950, transferred from ACAS (Training) - xxx 1976, renamed Director of Security (Ground defence and Fire Services) (RAF))
Directorate-General of Security (RAF) (xxx 1976 - xxx 1981, renamed Directorate-General of RAF Regiment and Security (RAF))
Director of Security (Ground Defence and Fire Services) (RAF) (xxx 1976, renamed from Director of Ground Defence - xxx 1981, renamed Director of Regiment and Fire Services (RAF))
Director of Security (Provost Marshal) (RAF) (xxx 1976, transferred from Department of AMP - xxx 1981, renamed Director of Security and Provost Marshal (RAF))
Directorate-General of RAF Regiment and Security (RAF) (xxx 1981, renamed from Directorate-General of Security (RAF) - Jan 1985)
Director of Regiment and Fire Services (RAF) (xxx 1981, renamed from Director of Security (Ground Defence and Fire Services) (RAF) - Jan 1985)
Director of Security and Provost Marshal (RAF) (xxx 1981, renamed from Director of Security (Provost Marshal) (RAF) - Jan 1985)
[CAS | DCAS | ACAS (General) | ACAS (Policy) | ACAS (Ops) | ACAS | ACAS (Intelligence) | ACAS (Training) | ACAS (OR) | ACAS (Signals)]
This entry was last updated on 01/08/26
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