| Unit | Dates | Aircraft | Base | Notes | 
|---|
| 226 OCU | Aug 46–Aug 49 Sep 49–Jun 55
 Jun 63–Sep 74
 Oct 74–Sep 91
 | Oxford I, Beaufighter X Hornet F.1
 Mosquito III/TT.35
 Tiger Moth II
 Vampire F.1/FB.5/T.11
 Meteor F.3/F.4/T.7/F.8/FR.9
 Tempest II
 Martinet I
 Spitfire XIV/XVI/XVIII/XIX/F.22
 Javelin T.3
 Lightning F.1/F.1A/F.3/T.4/T.5
 Jaguar GR.1/T.2
 | RAF Molesworth RAF Bentwaters
 RAF Driffield
 RAF Stradishall
 RAF Middleton St. George
 RAF Coltishall
 RAF Lossiemouth
 | Formed at Molesworth by re-designating 1335 (Meteor) CU. Disbanded at Driffield to become 203 AFS. Re-formed at Stradishall by renaming 203 AFS. Re-formed at Middleton St. George by merging the Lightning Conversion Squadron and the Fighter Command Instrument Rating Squadron. Disbanded at Coltishall. Immediately re-formed at Lossiemouth by re-designating the Jaguar Operational Conversion Unit. Disbanded at Lossiemouth to become 16 (Reserve) Sqn
 | 
| 227 OCU 227 (AOP) CU
 | May 47–Dec 47 Dec 47–May 50
 | Tiger Moth II Oxford I
 Auster V
 Auster VI
 Auster T.7
 Auster A.2/45
 Harvard IIB
 | RAF Andover RAF Middle Wallop
 | Formed by re-designation of No. 43 OTU Became the Air Observation Post School.
 | 
| 228 OCU | May 47–Sep 61 May 65–Dec 66
 Aug 68–Jul 92
 | Martinet I Master II
 Oxford I
 Tiger Moth II
 Brigand B.1/T.4/T.5
 Tempest V
 Buckmaster T.1
 Wellington XVIII
 Mosquito III/VI/NF.30/TT.35/NF.36
 Balliol T.2
 Valetta C.1/T.3/T.4
 Prentice T.1
 Vampire T.11
 Meteor F.4/T.7/NF.11/NF.12/NF.14
 Anson XIX
 Chipmunk T.10
 Javelin T.3/FAW.5/FAW.7/FAW.9
 Canberra T.4/T.11
 Phantom FGR.2
 Jet Provost T.4
 | RAF Leeming RAF Leuchars
 RAF Coningsby
 | Formed by merging No. 13 OTU and No. 54 OTU Became 64 (R) Sqn
 | 
| 229 OCU | Dec 50–Sep 74 Nov 84–Jul 92
 | Vampire FB.5/T.11 Meteor T.7/F.8/TT.8
 Hunter F.1/F.4/F.6/T.7/FGA.9/FR.10
 Tempest V
 Beaufighter X
 Oxford I/II
 Mosquito III/TT.35
 Martinet I
 Anson T.21/T.22
 Sabre F.2/F.4
 Chipmunk T.10
 Jet Provost T.3A
 Tornado F.2(T)/F.3
 | RAF Leuchars RAF Chivenor
 RAF Brawdy
 RAF Coningsby
 | Formed from 'B' and 'D' Flights of 226 OCU. Reformed 1957 at Chivenor, still there late 1962. Relocated to RAF Brawdy mid 1960s
 Disbanded 2 September 1974 at Brawdy to become the Tactical Weapons Unit
 Designated 65 (Shadow) Squadron from 31 December 1986
 Became 56 (R) Sqn.
 | 
| 230 OCU | Mar 47–Oct 52 Aug 53–Feb 55
 May 56–Aug 81
 | Lancaster I/III Lincoln B.2
 Mosquito III/B.35/NF.36
 Tiger Moth
 Anson XIX
 Vulcan B.1/B.2
 Hastings T.5
 Canberra T.4
 | RAF Lindholme RAF Scampton
 RAF Upwood
 RAF Waddington
 RAF Finningley
 RAF Scampton
 | Formed by re-designting 1653 HCU Disbanded 15 October 1952 to become the Reserve Training Squadron
 Became the Lincoln Conversion Flight at Upwood 1 February 1955.
 | 
| 231 OCU | Mar 47–Dec 49 Dec 51–Dec 90
 May 1991–Apr 93
 | Lancaster I/III Anson XII/XIX/T.22
 Mosquito III/VI/XVI/PR.34/PR.34A/B.35
 Chipmunk T.10
 Meteor T.7/PR.10
 Canberra B.2/PR.3/T.4
 | RAF Coningsby RAF Waddington
 RAF Bassingbourn
 RAF Cottesmore
 RAF Marham
 RAF Wyton
 | Formed by re-designating No. 16 OTU re-formed at Bassingbourn by re-designation of 237 OCU
 Disbanded at Wyton, 15 December 1990, to become the Canberra Standardisation and Training Flight
 Re-formed at Wyton 13 May 1990 from the Canberra Standardisation and Training Flight
 | 
| 232 OCU | Feb 55–Jun 65 Feb 70–Apr 86
 | Valiant B.1 Victor B.1/B(PR).1/B.1A/B.2/BK.2
 Canberra T.4
 | RAF Gaydon RAF Marham
 | At Gaydon, 30 June 1965, the Victor element became the Tanker Training Flight Re-formed at Marham 6 February 1970 by amalgamating the Victor (B.2) Training Flight and the Victor Training Unit
 | 
| 233 OCU | Sep 52–Sep 57 Oct 70–Sep 92
 | Vampire FB.5/FB.9/T.11 Balliol T.2
 Meteor T.7/F.8
 Oxford I
 Tiger Moth II
 Mosquito III/PR.34A/TT.35
 Tempest V
 Chipmunk T.10
 Hunter F.1
 Harrier GR.1/GR.1A/GR.3/GR.3A/T.2/T.4/T.4A/GR.5
 | RAF Pembrey[1] RAF Wittering
 | Became 20 (R) Sqn | 
| 235 OCU | Jul 47–Oct 53 | Sunderland V Short Seaford
 | RAF Calshot | Became the Flying Boat Training Squadron | 
| 236 OCU | Jul 47–Sep 56 Jul 70–Sep 92
 | Lancaster III Oxford I/II
 Beaufighter X
 Shackleton GR.1/MR.1A
 Neptune MR.1
 Martinet I
 Tiger Moth II
 Spitfire XVI
 Vampire FB.5
 Anson XI/XIX
 Mosquito TT.35
 Brigand T.5
 Buckmaster T.1
 Nimrod MR1 & MR2
 | RAF Kinloss RAF St Mawgan
 | Formed by re-designating No. 6 OTU | 
| 237 OCU | Jul 47–Dec 51 Oct 56–Jan 58
 Mar 71–Oct 91
 | Oxford I Mosquito III/PR.34/PR.34A
 Spitfire XVI/XIX
 Harvard IIB
 Meteor T.7/PR.10
 Canberra PR.3/T.4
 Hunter F.6/T.7/T.7A/T.7B/T.8C
 Buccaneer S.2A/S.2B
 | RAF Benson RAF Bassingbourn
 RAF Wyton
 RAF Honington
 RAF Lossiemouth
 | Formed by re-designating No. 8 OTU Became 231 OCU at Bassingbourn.
 Re-formed at Wyton, 1956, by re-designating 'C' Squadron of 231 OCU.
 Re-absorbed by 231 OCU January 1958.
 | 
| 238 OCU | 1 Jun 52–Mar 58 | Buckmaster T.1 Brigand T.4/T.5
 Mosquito TT.35
 Balliol T.2
 Meteor NF.12/NF.14
 Valetta C.1/T.3
 | RAF Colerne RAF North Luffenham
 | Formed by re-designating the Airborne Interception School | 
| 240 OCU | Jan 48–Apr 51 Dec 71–Oct 93
 | Anson I/X/XII/XIX Dakota IV
 Hastings MET.1
 Valetta C.1
 Wessex HC.2
 Puma HC.1
 ChinookHC.1
 | RAF North Luffenham RAF Odiham
 | Formed by merging 1333 (TS)CU with 1382 (T)CU | 
| 241 OCU | Jan 48–Apr 51 Jul 70–Oct 93
 | York C.1 Halifax IX
 Hastings C.1
 Valetta C.1
 Tiger Moth II
 Anson XI/XII
 Brittania C.1/C.2
 Andover C.1
 Belfast C.1
 VC10 C.1
 Tristar C.1
 BAe 146
 | RAF Dishforth RAF Brize Norton
 | Formed by re-designating 1332 HTCU. Became No. 55 (Reserve) Squadron RAF
 | 
| 242 OCU | Apr 51–Jul 92 | Valetta C.1 Hastings C.1/MET.1/C.1A
 Beverley C.1
 Argosy C.1
 Andover C.1
 Hercules C.1/C.1K/C.1P/C.3
 Tiger Moth II
 Anson XII
 Chipmunk T.10
 | RAF Dishforth RAF Thorney Island
 RAF Lyneham
 | Became 57 (R) Sqn | 
| 1330 CU | Jun 44–Mar 46 | Harvard IIA Baltimore IV/V
 Vengeance IV
 Hudson IIIA
 Expeditor I
 Marauder II/III
 Ventura V
 Hellcat II
 Beaufighter X
 Spitfire Vb
 Mustang IVA
 Anson I
 Dakota I/III
 Douglas DC-2
 Mosquito III/IV
 Oxford I
 | RAF Bilbeis | No. 1 (Middle East) Check and Conversion Unit RAF re-designated. | 
| 1331 CU 1331 HTCU
 | Sep 44–Jan 46 Dec 46–Jan 48
 | Harvard IIB Vengeance IA/II/IV
 Beaufighter VI/X
 Spitfire VIII
 Mustang IV
 Mosquito III
 Oxford I
 Blenheim V
 Thunderbolt I/II
 Hurricane IIC
 Wellington XVI
 Liberator III/VI
 | RAF Mauripur RAF Risalpur
 RAF Syerston
 | Formed by re-designating Check and Conversion Flight. | 
| 1332 (T)HCU 1332 HTCU
 | Sep 44–May 47 May 47–Jan 48
 | Liberator III/V /VI/VII/IX York C.1
 Stirling III
 Halifax VII/IX
 Skymaster C.1
 Oxford I
 | RAF Longtown RAF Dishforth
 | Became 241 OCU. | 
| 1333 (TS)CU 1333 TSCU
 | Mar 45–Jul 46 Jul 46–Jan 48
 | Dakota III/IV Horsa I/II
 Halifax VII/IX
 Oxford II
 Miles Magister
 Tiger Moth
 Proctor IV
 Auster III
 | RAF Leicester East RAF North Luffenham
 | Formed by re-designating No. 107 OTU Merged with 1382 (T)CU to become 240 OCU.
 | 
| 1334 (TS)CU | Apr 45–Mar 45 | Dakota III/IV | RAF Gujrat RAF Baroda
 |  | 
| 1335 (M)CU | Mar 45–Aug 46 | Meteor F.1/F.3 Oxford II
 Martinet I
 | RAF Colerne RAF Molesworth
 | Became 226 OCU | 
| 1336 (TS)CU 1336 TCU
 | Jun 45–Mar 46 | Dakota III | RAF Welford |  | 
| 1380 (TS)CU 1380 TCU
 | Aug 45–Jan 46 | Wellington X Anson I
 Proctor II
 | RAF Tilstock | Formed by re-designating No. 81 OTU | 
| 1381 (T)CU | Aug 45–Feb 48 | Dakota III/IV Wellington X
 Miles Magister
 Tiger Moth II
 Oxford I
 | RAF Bramcote RAF Dishforth
 | Formed by re-designating No. 105 OTU | 
| 1382 (T)CU | Aug 45–Jan 48 | Oxford I Miles Magister
 Dakota III/IV
 | RAF Wymeswold RAF North Luffenham
 | Formed by re-designating No. 108 OTU Merged with 1330 TSCU to form 240 OCU.
 | 
| 1383 (T)CU | Aug 45–Aug 46 | Dakota III Oxford II
 Halifax VII
 | RAF Crosby-on-Eden | Formed by re-designating No. 109 OTU | 
| 1384 (HT)CU | Nov 45–Jun 46 | Dakota I Oxford I
 York C.1
 | RAF Ossington RAF Wethersfield
 | Formed by re-designating No. 6 Lancaster Finishing School RAF | 
| 1385 (HTS)CU | Apr 46–Jun 46 | Stirling V Halifax VII
 Horsa II
 Oxford I
 | RAF Wethersfield | Absorbed by 1333 TSCU | 
| 1584 (HB)CU | Nov 43–Feb 44 | Liberator III | RAF Kolar RAF Salbani
 | Formed by re-designating No. 1584 (Heavy Bomber Conversion) Flight RAF. Became 1673 HCU.
 | 
| 1651 CU 1651 HCU
 | Jan 42–July 44 May 44–Mar 45
 Mar 45–Jul 45
 | Stirling I/III Lancaster I/III
 Oxford I
 Spitfire Vb
 Tiger Moth II
 Beaufighter X
 Halifax II
 | RAF Waterbeach RAF Wratting Common
 RAF Woolfox Lodge
 | During 1942 it flew 49 operational sorties for RAF Bomber Command with a loss of five aircraft. Formed by merging No. 26 Conversion Flight RAF and No. 106 Conversion Flight RAF.
 Absorbed 15 Squadron Conversion Flight and 24 Squadron Conversion Flight.
 | 
| 1652 CU 1652 HCU
 | Jan 42–Jun 45 | Halifax I/II/III/V Spitfire Vb
 Hurricane IIC
 Spitfire Vb
 Hurricane IIC/IV
 | RAF Marston Moor RAF Bentwaters
 | During 1942 it flew 42 operational sorties for RAF Bomber Command with a loss of three aircraft. Formed by merging No. 28 Conversion Flight RAF and No. 109 Conversion Flight RAF.
 Absorbed  35 Squadron Conversion Flight
 | 
| 1653 CU 1653 HCU
 | Jan 42–Oct 42 Nov 43–Nov 46
 | Liberator II Stirling I/III
 Lancaster I/III
 Blenheim IV
 Ventura I
 Mosquito XIX
 Hurricane IIC
 Spitfire Vb
 Beaufighter VI
 | RAF Polebrook RAF Burn
 RAF Chedburgh
 RAF Lindholme
 RAF North Luffenham
 | Formed by re-designating No. 108 Conversion Flight RAF Became No. 230 Operational Conversion Unit RAF in March 1947.
 | 
| 1654 CU 1654 HCU
 | May 42–Jul 42 Jul 42–Sep 45
 | Manchester I Lancaster I
 Halifax II/V
 Stirling III
 Oxford I
 Hurricane IIC
 Spitfire Vb
 | RAF Swinderby RAF Wigsley
 | During 1942 it flew 12 operational sorties with a loss of two aircraft. | 
| 1655 MCU | Aug 42–May 43 | Mosquito III/IV/XVI/B.20/B.25 Blenheim IV
 Oxford I
 | RAF Horsham St. Faith RAF Upper Heyford
 RAF Marham
 | Became Mosquito Training Unit RAF at RAF Marham | 
| 1656 HCU | Oct 42–Nov 45 | Lancaster I/III Halifax II/V
 Manchester I
 Spitfire IIa/Vb
 Hurricane IIC
 | RAF Lindholme Tiger Moth II
 | Formed by merging 103 and 460 Squadron Conversion Fights. | 
| 1657 HCU | Oct 42–Dec 44 | Stirling I/III/IV Lancaster I/II
 Tomahawk IIB
 Oxford II
 Hurricane IIC
 | RAF Stradishall | Formed by merging 7, 101 and 149 Squadron Conversion Fights. | 
| 1658 HCU | Oct 42–Apr 45 | Halifax I/II/III Oxford II
 Hurricane IIC
 | RAF Riccall | Formed by merging 10, 76 and 78 Squadron Conversion Fights. | 
| 1659 HCU | Oct 42–Mar 43 Mar 43–Sep 45
 | Halifax I/II/III Lancaster I/III
 Oxford II
 Spitfire IIa/Vb
 Hurricane IIC
 Tiger Moth
 | RAF Leeming RAF Topcliffe
 | Formed by merging 405 and 408 Squadron Conversion Fights. Trained Canadian aircrew.
 | 
| 1660 HCU | Oct 42–Nov 46 | Lancaster I/II/III Halifax II
 Manchester I
 Mosquito XIX
 Stirling I/III
 Oxford I
 Spitfire Vc
 Hurricane IIC
 Lysander I
 de Havilland Puss Moth
 | RAF Swinderby | Formed by merging 61, 97, 106 and 7 Squadron Conversion Fights. Absorbed by No. 1653 Heavy Conversion Unit RAF
 | 
| 1661 HCU | Nov 42–Aug 45 | Lancaster I/II Halifax II/V
 Manchester I
 Mosquito XIII
 Stirling III
 Oxford II
 Spitfire Vb
 Hurricane IIC
 | RAF Winthorpe | Formed by merging 9, 44 and 49 Squadron Conversion Fights. Short Stirlings replaced the planned re-equipment with Handley Page Halifaxs.[3]
 | 
| 1662 HCU | Jan 43–Apr 45 | Lancaster I/II Halifax I/II/III/V
 Oxford II
 Spitfire Vb
 Hurricane IIC
 Tiger Moth II
 | RAF Blyton |  | 
| 1663 HCU | Mar 43–May 45 | Halifax I/II/III/V Stirling I
 Oxford II
 Spitfire Vb
 Hurricane IIC
 | RAF Rufforth |  | 
| 1664 HCU 1664 (RCAF)HCU
 | May 43–Apr 44 Apr 44–Apr 45
 | Lancaster I/III Halifax II/III/V
 Oxford II
 Spitfire Vb
 Hurricane IIC
 | RAF Croft RAF Dishforth
 | The unit had the Canadian name Caribou. | 
| 1665 HCU 1665 (HT)CU
 | Apr 43–Jun 43 Jun 43–Jan 44
 Jan 44–Aug 45
 Aug 45–Jul 46
 | Halifax III/V/VI/VII Stirling I/III/IV
 Oxford II
 Spitfire IIa/Vb
 Hurricane X
 Tiger Moth II
 Mosquito VI
 Lancaster I
 | RAF Mepal RAF Woolfox Lodge
 RAF Tilstock
 RAF Saltby
 RAF Marston Moor
 RAF Linton-on-Ouse
 | Re-designated as 1665 (HT)CU on 10 August 1945 | 
| 1666 HCU 1666 (RCAF)HCU
 | Jun 43–Oct 43 Oct 43–Aug 45
 | Halifax II/III/V Lancaster I/II/III
 Oxford II
 Spitfire IIa/Vb
 Hurricane IIC
 | RAF Dalton RAF Wombleton
 | The unit had the Canadian name Mohawk. | 
| 1667 HCU | Jun 43–Oct 43 Oct 43–Feb 44
 Feb 44–Nov 45
 | Halifax II/V Oxford II
 Spitfire Vb
 Hurricane IIC
 Tiger Moth II
 Lancaster I/III
 | RAF Lindholme RAF Faldingworth
 RAF Sandtoft
 |  | 
| 1668 HCU | Aug 43–Nov 43 Jul 44–Mar 46
 | Lancaster I/II/III/X Mosquito XIX
 Spitfire Vb
 Hurricane IIC
 Beaufighter VI
 | RAF Balderton RAF Bottesford
 | Disbanded November 1943, re-formed July 1944. | 
| 1669 HCU | Aug 44–Mar 45 | Handley Page Halifax Lancaster I/III
 Spitfire Vb
 Hurricane IIC
 | RAF Langar |  | 
| 1670 (T)CU | Jun 44–Jan 45 | Thunderbolt Harvard IIB
 | RAF Yelahanka | Became 8 Refresher Flying Unit | 
| 1670 CU | Feb 44–Jun 44 | Beaufighter VI | RAF Baigachi | Formed from AI MkVIII Conversion Flight | 
| 1670 (M)CU | Feb 44–Aug 45 | Blenheim V Mosquito III
 Oxford I
 | RAF Yelahanka |  | 
| 1673 HCU | Feb 44–Apr 44 Apr 44–Nov 44
 | Liberator III Tiger Moth II
 Anson I
 | RAF Salbani RAF Kolar
 | Formed by re-designating No. 1584 (Heavy Bomber) Conversion Unit RAF. | 
| 1674 HCU | Oct 43–Nov 45 | Liberator III/V/VI/VIII Halifax II
 Fortress I/II/IIA
 Wellington XIII
 Oxford I/II
 Hurricane IIC
 Martinet I
 | RAF Aldergrove various bases in Northern Ireland
 RAF Lossiemouth
 |  | 
| 1675 HCU | Oct 43–Aug 44 Aug 44–Oct 45
 | Liberator II Harvard IIA
 Hurricane IIB
 Argus II
 | RAF Lydda RAF Abu Sueir
 | Formed by re-designating 5 Heavy Bomber Conversion Unit, Lydda | 
| 1678 HCU | Sep 43–Jun 44 | Lancaster II | RAF Foulsham RAF Waterbeach
 |  | 
| 1699 (BS)CU 1699 HCU
 | Oct 44–Jun 45 | Fortress II/III Liberator VI
 Lancastrian II
 | RAF Oulton RAF Full Sutton
 | Became the Lancastrian Flight of No. 231 Squadron RAF | 
| All-Weather OCU | ?–? | Anson T.21 Vampire T.11
 Meteor T.7/F.8/NF.12/NF.14
 | nomadic |  | 
| Argosy CU | Nov 61–Apr 63 | Argosy C.1 | RAF Benson | Became the Argosy Flight of 242 OCU | 
| Belvedere CU | Aug 64–Aug 68 | Belvedere HC.1 | RAF Odiham | Absorbed by the Short-Range Conversion Unit | 
| Short-Range CU | Aug 64–Jul 67 | Twin Pioneer CC.2 Wessex HC.2
 Auster AOP.9
 | RAF Odiham | Became the Helicopter Operational Conversion Flight | 
| Jaguar OCU | Jun 74–Sep 74 | Jaguar GR.1/T.2 | RAF Lossiemouth | Formed from Jaguar Conversion Team. Became 226 OCU
 | 
| 5 Heavy Bomber Conversion Unit | ?–? | Liberator | [[RAF Lydda], RCAF Boundary Bay and RCAF Abbotsford] | Became 1675 HCU In April 1944 RCAF Boundary Bay BCATP No. 5 Operational Training Unit (for Heavy Conversion) established when Seventeen B-24 Liberators were scheduled to arrive fresh from American factories that first month. However, only sixteen would actually be delivered. By Sept 30th 1944 RCAF 5 O.T.U. reported B-24 Liberators; Abbotsford 24, Boundary Bay 14, total 38. B-25 Mitchells; Boundary Bay only total 35. Bolingbrokes; Boundary Bay only total 5. P-40 Kittyhawks; Boundary Bay only 8. Norseman; Boundary Bay only 1. Total aircraft on Unit strength 87 | 
| Heavy Bomber Conversion Unit, Salbani | Sep 42–Jul 43 | Liberator III | RAF Salbani | Became 1584 HCU | 
| Heavy Glider Conversion Unit | Jul 42–Oct 44 | Whitley V Albemarle I/GT.I/ST.II/ST.V
 Horsa I/II
 Oxford I/II
 Tiger Moth II
 Miles Magister
 | RAF Shrewton RAF Brize Norton
 | Became No. 21 Heavy Glider Conversion Unit RAF | 
| 21 HGCU | Oct 44–Dec 47 | Whitley V Albemarle GT.VI
 Horsa I/II
 Oxford I
 Tiger Moth I
 Miles Magister
 Hotspur II/III
 Hadrian I
 Stirling IV
 Halifax III/VII
 Master II
 
 | RAF Brize Norton RAF North Luffenham
 | Formed by re-designation of the Heavy Glider Conversion Unit | 
| 22 HGCU | Oct 44–Dec 47 | Albemarle GT.I/ST.II/ST.V/GT.VI Horsa I/II
 Oxford I
 Hadrian I
 | RAF Keevil RAF Blakehill Farm
 | Formed by re-designation of an element of the Heavy Glider Conversion Unit | 
| 23 HGCU | Oct 44–Dec 45 | Albemarle GT.I/ST.V/ST.VI Horsa I/II
 Oxford I
 Hadrian I
 Proctor III
 | RAF Peplow | Formed by elements of No. 83 OTU the Heavy Glider Conversion Unit | 
|