List of RAF squadron codes
Most units of the Royal Air Force are identified by a two character alphabetical or alpha- numeric combination squadron code. Usually, that code is painted on the aircraft belonging to that squadron. The squadron code is usually presented along with an individual letter or character to form a call sign for the particular aircraft. Location of the call sign combination has usually been on the rear fuselage next to the RAF roundel.
In instances when an unusually large numbers of aircraft comprise the squadron, multiple squadron codes have been used.
Other air forces, especially those from other Commonwealth countries, have often used similar systems of identification. During the Second World War, when units from other air forces were attached to the RAF; such as the Article XV squadrons, their squadron codes were often changed, to avoid confusion with RAF units.
Squadron codes
A-E
F- J
| Squadron code | Unit | Unit shorthand |
| F | Air / Sea Warfare Development Unit RAF | A/SWDU |
| F | No. 111 Operational Training Unit RAF | 111 OTU |
| F | No. 12 Squadron RAF | 12 Sqn |
| F | No. 16 Squadron RAF | 16 Sqn |
| F | No. 19 Flying Training School RAF | 19 FTS |
| F | No. 240 Operational Conversion Unit RAF | 240 OCU |
| F | No. 25 Squadron RAF | 25 Sqn |
| F | No. 4 Flying Training School RAF | 4 FTS |
| F | No. 6 Flying Training School RAF | 6 FTS |
| F1 | 'P' Flight No. 1 Anti-Aircraft Co-operation Unit RAF | 'P' Flt 1 AACU |
| F2 | No. 635 Squadron RAF | 635 Sqn |
| F3 | No. 438 Squadron RCAF | 438 Sqn RCAF |
| FA | No. 236 Squadron RAF | 236 Sqn |
| FA | No. 281 Squadron RAF | 281 Sqn |
| FAA | No. 19 Flying Training School RAF | 19 FTS |
| FAA | RAF College Flying Training School | RAF Coll FTS |
| FAB | No. 19 Flying Training School RAF | 19 FTS |
| FAB | RAF College Flying Training School | RAF Coll FTS |
| FAC | No. 19 Flying Training School RAF | 19 FTS |
| FAC | RAF College Flying Training School | RAF Coll FTS |
| FAD | No. 19 Flying Training School RAF | 19 FTS |
| FAD | RAF College Flying Training School | RAF Coll FTS |
| FAE | No. 19 Flying Training School RAF | 19 FTS |
| FAE | RAF College Flying Training School | RAF Coll FTS |
| FAF | No. 19 Flying Training School RAF | 19 FTS |
| FAF | RAF College Flying Training School | RAF Coll FTS |
| FAG | No. 19 Flying Training School RAF | 19 FTS |
| FAG | RAF College Flying Training School | RAF Coll FTS |
| FAI | No. 2 Flying Training School RAF | 2 FTS |
| FAI | No. 20 Flying Training School RAF | 20 FTS |
| FAI | No. 20 Service Flying Training School | 20 SFTS |
| FAJ | No. 2 Flying Training School RAF | 2 FTS |
| FAJ | No. 20 Flying Training School RAF | 20 FTS |
| FAJ | No. 20 Service Flying Training School | 20 SFTS |
| FAK | No. 2 Flying Training School RAF | 2 FTS |
| FAK | No. 20 Flying Training School RAF | 20 FTS |
| FAK | No. 20 Service Flying Training School | 20 SFTS |
| FAL | No. 2 Flying Training School RAF | 2 FTS |
| FAL | No. 20 Flying Training School RAF | 20 FTS |
| FAL | No. 20 Service Flying Training School | 20 SFTS |
| FAM | No. 2 Flying Training School RAF | 2 FTS |
| FAM | No. 20 Flying Training School RAF | 20 FTS |
| FAM | No. 20 Service Flying Training School | 20 SFTS |
| FAN | No. 21 Flying Training School RAF | 21 FTS |
| FAO | No. 21 Flying Training School RAF | 21 FTS |
| FAP | No. 21 Flying Training School RAF | 21 FTS |
| FAQ | No. 21 Flying Training School RAF | 21 FTS |
| FAS | No. 16 Flying Training School | 16 FTS |
| FAT | No. 16 Flying Training School | 16 FTS |
| FAU | No. 16 Flying Training School | 16 FTS |
| FAV | No. 16 Flying Training School | 16 FTS |
| FAW | No. 16 Flying Training School | 16 FTS |
| FAX | No. 16 Flying Training School | 16 FTS |
| FAY | No. 16 Flying Training School | 16 FTS |
| FB | No. 24 Operational Training Unit RAF | 24 OTU |
| FB | No. 35 Squadron RAF | 35 Sqn |
| FB | Washington Conversion Unit RAF | WCU |
| FBA | No. 7 Flying Training School RAF | 7 FTS |
| FBA | No. 7 Service Flying Training School | 7 SFTS |
| FBB | No. 7 Flying Training School RAF | 7 FTS |
| FBB | No. 7 Service Flying Training School | 7 SFTS |
| FBC | No. 7 Flying Training School RAF | 7 FTS |
| FBC | No. 7 Service Flying Training School | 7 SFTS |
| FBD | No. 7 Flying Training School RAF | 7 FTS |
| FBD | No. 7 Service Flying Training School | 7 SFTS |
| FBE | No. 7 Flying Training School RAF | 7 FTS |
| FBE | No. 7 Service Flying Training School | 7 SFTS |
| FBG | No. 6 Flying Training School RAF | 6 FTS |
| FBG | No. 6 Service Flying Training School | 6 SFTS |
| FBH | No. 6 Flying Training School RAF | 6 FTS |
| FBH | No. 6 Service Flying Training School | 6 SFTS |
| FBI | No. 6 Flying Training School RAF | 6 FTS |
| FBI | No. 6 Service Flying Training School | 6 SFTS |
| FBJ | No. 6 Flying Training School RAF | 6 FTS |
| FBJ | No. 6 Service Flying Training School | 6 SFTS |
| FBK | No. 6 Flying Training School RAF | 6 FTS |
| FBK | No. 6 Service Flying Training School | 6 SFTS |
| FBL | No. 6 Flying Training School RAF | 6 FTS |
| FBL | No. 6 Service Flying Training School | 6 SFTS |
| FBM | No. 6 Flying Training School RAF | 6 FTS |
| FBM | No. 6 Service Flying Training School | 6 SFTS |
| FBN | No. 6 Flying Training School RAF | 6 FTS |
| FBN | No. 6 Service Flying Training School | 6 SFTS |
| FBP | No. 3 Flying Training School RAF | 3 FTS |
| FBP | No. 3 Service Flying Training School | 3 SFTS |
| FBQ | No. 3 Flying Training School RAF | 3 FTS |
| FBQ | No. 3 Service Flying Training School | 3 SFTS |
| FBR | No. 3 Flying Training School RAF | 3 FTS |
| FBR | No. 3 Service Flying Training School | 3 SFTS |
| FBS | No. 3 Flying Training School RAF | 3 FTS |
| FBS | No. 3 Service Flying Training School | 3 SFTS |
| FBT | No. 3 Flying Training School RAF | 3 FTS |
| FBT | No. 3 Service Flying Training School | 3 SFTS |
| FBU | No. 3 Flying Training School RAF | 3 FTS |
| FBU | No. 3 Service Flying Training School | 3 SFTS |
| FBV | No. 3 Flying Training School RAF | 3 FTS |
| FBV | No. 3 Service Flying Training School | 3 SFTS |
| FBW | No. 3 Flying Training School RAF | 3 FTS |
| FBW | No. 3 Service Flying Training School | 3 SFTS |
| FBX | No. 3 Flying Training School RAF | 3 FTS |
| FBX | No. 3 Service Flying Training School | 3 SFTS |
| FC | Station Flight RAF Kenley | |
| FCA | No. 1 Flying Training School RAF | 1 FTS |
| FCA | No. 17 Flying Training School RAF | 17 FTS |
| FCA | No. 17 Service Flying Training School | 17 SFTS |
| FCB | No. 1 Flying Training School RAF | 1 FTS |
| FCB | No. 17 Flying Training School RAF | 17 FTS |
| FCB | No. 17 Service Flying Training School | 17 SFTS |
| FCC | No. 1 Flying Training School RAF | 1 FTS |
| FCC | No. 17 Flying Training School RAF | 17 FTS |
| FCC | No. 17 Service Flying Training School | 17 SFTS |
| FCD | No. 1 Flying Training School RAF | 1 FTS |
| FCD | No. 17 Flying Training School RAF | 17 FTS |
| FCD | No. 17 Service Flying Training School | 17 SFTS |
| FCE | No. 1 Flying Training School RAF | 1 FTS |
| FCE | No. 17 Flying Training School RAF | 17 FTS |
| FCE | No. 17 Service Flying Training School | 17 SFTS |
| FCF | No. 1 Flying Training School RAF | 1 FTS |
| FCF | No. 17 Flying Training School RAF | 17 FTS |
| FCF | No. 17 Service Flying Training School | 17 SFTS |
| FCG | No. 1 Flying Training School RAF | 1 FTS |
| FCG | No. 17 Flying Training School RAF | 17 FTS |
| FCG | No. 17 Service Flying Training School | 17 SFTS |
| FCI | No. 22 Flying Training School RAF | 22 FTS |
| FCI | No. 22 Service Flying Training School | 20 SFTS |
| FCJ | No. 22 Flying Training School RAF | 22 FTS |
| FCJ | No. 22 Service Flying Training School | 22 SFTS |
| FCK | No. 22 Flying Training School RAF | 22 FTS |
| FCK | No. 22 Service Flying Training School | 22 SFTS |
| FCL | No. 22 Flying Training School RAF | 22 FTS |
| FCL | No. 22 Service Flying Training School | 22 SFTS |
| FCM | No. 22 Flying Training School RAF | 22 FTS |
| FCM | No. 22 Service Flying Training School | 22 SFTS |
| FCT | Empire Central Flying School | ECFS |
| FCT | Empire Flying School | EFS |
| FCT | RAF Flying College | RAF Fng Coll |
| FCU | Empire Central Flying School | ECFS |
| FCU | Empire Flying School | EFS |
| FCU | RAF Flying College | RAF Fng Coll |
| FCV | Empire Central Flying School | ECFS |
| FCV | Empire Flying School | EFS |
| FCV | RAF Flying College | RAF Fng Coll |
| FCW | Empire Central Flying School | ECFS |
| FCW | Empire Flying School | EFS |
| FCW | RAF Flying College | RAF Fng Coll |
| FCX | Empire Central Flying School | ECFS |
| FCX | Empire Flying School | EFS |
| FCX | RAF Flying College | RAF Fng Coll |
| FD | No. 114 Squadron RAF | 114 Sqn |
| FD | No. 1659 Conversion Unit RAF | 1659 CU |
| FDA | No. 1 Flying Unit | 1 FU |
| FDA | No. 21 Flying School | 21 FS |
| FDA | No. 21 Advanced Flying Unit | 21 AFU |
| FDB | No. 1 Flying Training School RAF | 1 FU |
| FDB | No. 21 Flying School | 21 FS |
| FDB | No. 21 Advanced Flying Unit | 21 AFU |
| FDC | No. 1 Flying Unit RAF | 1 FU |
| FDC | No. 21 Flying School RAF | 21 FS |
| FDC | No. 21 Advanced Flying Unit | 21 AFU |
| FDD | No. 1 Flying Unit RAF | 1 FU |
| FDD | No. 21 Flying School | 21 FS |
| FDD | No. 21 Advanced Flying Unit | 21 AFU |
| FDE | No. 1 Flying Unit RAF | 1 FU |
| FDE | No. 21 Flying School | 21 FS |
| FDE | No. 21 Advanced Flying Unit | 21 AFU |
| FDF | No. 1 Flying Unit RAF | 1 FU |
| FDF | No. 21 Flying School | 21 FS |
| FDF | No. 21 Advanced Flying Unit | 21 AFU |
| FDG | No. 1 Flying Unit RAF | 1 FU |
| FDG | No. 21 Flying School | 21 FS |
| FDG | No. 21 Advanced Flying Unit | 21 AFU |
| FDI | Central Flying School | CFS |
| FDJ | Central Flying School | CFS |
| FDK | Central Flying School | CFS |
| FDL | Central Flying School | CFS |
| FDM | Central Flying School | CFS |
| FDN | Central Flying School | CFS |
| FDO | Central Flying School | CFS |
| FDQ | No. 10 Flying Instructors School RAF | 10 FIS |
| FDQ | No. 8 Elementary Flying Training School | 8 EFTS |
| FDR | No. 10 Flying Instructors School RAF | 10 FIS |
| FDR | No. 8 Elementary Flying Training School | 8 EFTS |
| FDS | No. 10 Flying Instructors School RAF | 10 FIS |
| FDS | No. 8 Elementary Flying Training School | 8 EFTS |
| FDT | No. 10 Flying Instructors School RAF | 10 FIS |
| FDT | No. 8 Elementary Flying Training School | 8 EFTS |
| FDU | Beam Approach School RAF | B App S |
| FDV | Beam Approach School RAF | B App S |
| FDW | Beam Approach School RAF | B App S |
| FDW | Central Flying School | CFS |
| FDX | Beam Approach School RAF | B App S |
| FDY | Airfield Controllers School RAF | ACS |
| FDY | School of Air Traffic Control RAF | S OF ATC |
| FDY | School of Flying Control RAF | S OF FC |
| FE | No. 56 Operational Training Unit RAF | 56 OTU |
| FE | No. 644 Squadron RAF | 644 Sqn |
| FEA | No. 1 Glider Training School RAF | 1 GTS |
| FED | No. 1 Glider Training School RAF | 1 GTS |
| FED | No. 1 Glider Training School RAF | 1 GTS |
| FEE | No. 1 Glider Training School RAF | 1 GTS |
| FEG | No. 3 Glider Training School RAF | 3 GTS |
| FEH | No. 3 Glider Training School RAF | 3 GTS |
| FEI | No. 3 Glider Training School RAF | 3 GTS |
| FEJ | No. 3 Glider Training School RAF | 3 GTS |
| FEK | No. 3 Glider Training School RAF | 3 GTS |
| FEL | No. 3 Glider Training School RAF | 3 GTS |
| FEM | No. 3 Glider Training School RAF | 3 GTS |
| FEN | No. 3 Glider Training School RAF | 3 GTS |
| FEP | No. 21 Heavy Glider Conversion Unit RAF | 21 HGCU |
| FEQ | No. 21 Heavy Glider Conversion Unit RAF | 21 HGCU |
| FER | No. 21 Heavy Glider Conversion Unit RAF | 21 HGCU |
| FES | No. 21 Heavy Glider Conversion Unit RAF | 21 HGCU |
| FET | No. 21 Heavy Glider Conversion Unit RAF | 21 HGCU |
| FF | No. 132 Squadron RAF | 132 Sqn |
| FF | No. 251 Squadron RAF | 251 Sqn |
| FFA | No. 10 Air Gunnery School RAF | 10 AGS |
| FFB | No. 10 Air Gunnery School RAF | 10 AGS |
| FFC | No. 10 Air Gunnery School RAF | 10 AGS |
| FFD | No. 10 Air Gunnery School RAF | 10 AGS |
| FFE | No. 11 Air Gunnery School RAF | 11 AGS |
| FFF | No. 11 Air Gunnery School RAF | 11 AGS |
| FFG | No. 11 Air Gunnery School RAF | 11 AGS |
| FFI | No. 1 Air Navigation School RAF | 1 ANS |
| FFI | No. 5 Air Navigation School RAF | 5 ANS |
| FFJ | No. 1 Air Navigation School RAF | 1 ANS |
| FFJ | No. 5 Air Navigation School RAF | 5 ANS |
| FFK | No. 1 Air Navigation School RAF | 1 ANS |
| FFK | No. 5 Air Navigation School RAF | 5 ANS |
| FFM | No. 2 Air Navigation School RAF | 1 ANS |
| FFM | No. 7 Air Navigation School RAF | 5 ANS |
| FFN | No. 2 Air Navigation School RAF | 2 ANS |
| FFN | No. 7 Air Navigation School RAF | 7 ANS |
| FFO | No. 2 Air Navigation School RAF | 2 ANS |
| FFO | No. 7 Air Navigation School RAF | 7 ANS |
| FFP | No. 2 Air Navigation School RAF | 2 ANS |
| FFP | No. 7 Air Navigation School RAF | 7 ANS |
| FFR | No. 10 Air Navigation School RAF | 10 ANS |
| FFS | No. 10 Air Navigation School RAF | 10 ANS |
| FFT | No. 10 Air Navigation School RAF | 10 ANS |
| FFU | No. 10 Air Navigation School RAF | 10 ANS |
| FG | No. 335 Squadron RAF | 335 Greek Sqn |
| FG | No. 72 Squadron RAF | 82 Sqn |
| FGA | Empire Air Armament School RAF | EAAS |
| FGA | RAF Flying College | RAF Fng Coll |
| FGB | Empire Air Armament School RAF | EAAS |
| FGB | RAF Flying College | RAF Fng Coll |
| FGC | Empire Air Armament School RAF | EAAS |
| FGC | RAF Flying College | RAF Fng Coll |
| FGE | Central Navigation and Control School RAF | CN & CS |
| FGE | Central Navigation School RAF | CNS |
| FGE | Empire Air Navigation School RAF | EANS |
| FGF | Central Navigation and Control School RAF | CN & CS |
| FGF | Central Navigation School RAF | CNS |
| FGF | Empire Air Navigation School RAF | EANS |
| FGG | Central Navigation and Control School RAF | CN & CS |
| FGG | Central Navigation School RAF | CNS |
| FGG | Empire Air Navigation School RAF | EANS |
| FGI | Aeroplane & Armament Experimental Establishment | A&AEE |
| FGJ | Aeroplane & Armament Experimental Establishment | A&AEE |
| FGK | Aeroplane & Armament Experimental Establishment | A&AEE |
| FGL | Aeroplane & Armament Experimental Establishment | A&AEE |
| FGM | Aeroplane & Armament Experimental Establishment | A&AEE |
| FGN | Aeroplane & Armament Experimental Establishment | A&AEE |
| FGP | Empire Test Pilots' School | ETPS |
| FGQ | Empire Test Pilots' School | ETPS |
| FGR | Empire Test Pilots' School | ETPS |
| FGT | Airborne Forces Experimental Establishment | AFEE |
| FGU | Airborne Forces Experimental Establishment | AFEE |
| FGV | Airborne Forces Experimental Establishment | AFEE |
| FGW | Airborne Forces Experimental Establishment | AFEE |
| FGX | Airborne Forces Experimental Establishment | AFEE |
| FH | No. 15 Operational Training Unit RAF | 15 OTU |
| FH | No. 258 Squadron RAF | 258 Sqn |
| FH | No. 53 Squadron RAF | 53 Sqn |
| FHA | No. 1 Elementary Flying Training School RAF | 1 EFTS |
| FHB | No. 1 Elementary Flying Training School RAF | 1 EFTS |
| FHC | No. 1 Elementary Flying Training School RAF | 1 EFTS |
| FHE | No. 2 Elementary Flying Training School RAF | 2 EFTS |
| FHF | No. 2 Elementary Flying Training School RAF | 2 EFTS |
| FHG | No. 2 Elementary Flying Training School RAF | 2 EFTS |
| FHI | No. 3 Elementary Flying Training School RAF | 3 EFTS |
| FHJ | No. 3 Elementary Flying Training School RAF | 3 EFTS |
| FHK | No. 3 Elementary Flying Training School RAF | 3 EFTS |
| FHM | No. 4 Elementary Flying Training School RAF | 4 EFTS |
| FHN | No. 4 Elementary Flying Training School RAF | 4 EFTS |
| FHO | No. 4 Elementary Flying Training School RAF | 4 EFTS |
| FHQ | No. 6 Elementary Flying Training School RAF | 6 EFTS |
| FHR | No. 6 Elementary Flying Training School RAF | 6 EFTS |
| FHS | No. 6 Elementary Flying Training School RAF | 6 EFTS |
| FHT | No. 6 Elementary Flying Training School RAF | 6 EFTS |
| FHV | No. 7 Elementary Flying Training School RAF | 7 EFTS |
| FHW | No. 7 Elementary Flying Training School RAF | 7 EFTS |
| FHX | No. 7 Elementary Flying Training School RAF | 7 EFTS |
| FHY | No. 7 Elementary Flying Training School RAF | 7 EFTS |
| FI | No. 1686 Flight RAF | 1686 Flt |
| FI | No. 83 Operational Training Unit RAF | 83 OTU |
| FI | Warwick Training Unit RAF | WTU |
| FIA | No. 11 Elementary Flying Training School RAF | 11 EFTS |
| FIB | No. 11 Elementary Flying Training School RAF | 11 EFTS |
| FIC | No. 11 Elementary Flying Training School RAF | 11 EFTS |
| FID | No. 11 Elementary Flying Training School RAF | 11 EFTS |
| FIJ | No. 15 Elementary Flying Training School RAF | 15 EFTS |
| FIK | No. 15 Elementary Flying Training School RAF | 15 EFTS |
| FIL | No. 15 Elementary Flying Training School RAF | 15 EFTS |
| FIN | No. 16 Elementary Flying Training School RAF | 16 EFTS |
| FIO | No. 16 Elementary Flying Training School RAF | 16 EFTS |
| FIP | No. 16 Elementary Flying Training School RAF | 16 EFTS |
| FIR | No. 17 Elementary Flying Training School RAF | 17 EFTS |
| FIS | No. 17 Elementary Flying Training School RAF | 17 EFTS |
| FIT | No. 17 Elementary Flying Training School RAF | 17 EFTS |
| FIV | No. 21 Elementary Flying Training School RAF | 21 EFTS |
| FIW | No. 21 Elementary Flying Training School RAF | 21 EFTS |
| FIX | No. 21 Elementary Flying Training School RAF | 21 EFTS |
| FIY | No. 21 Elementary Flying Training School RAF | 21 EFTS |
| FJ | No. 164 Squadron RAF | 164 Sqn |
| FJ | No. 261 Squadron RAF | 261 Sqn |
| FJ | No. 37 Squadron RAF | 37 Sqn |
| FJA | No. 22 Elementary Flying Training School RAF | 22 EFTS |
| FJB | No. 22 Elementary Flying Training School RAF | 22 EFTS |
| FJC | No. 22 Elementary Flying Training School RAF | 22 EFTS |
| FJD | No. 22 Elementary Flying Training School RAF | 22 EFTS |
| FJF | No. 24 Elementary Flying Training School RAF | 24 EFTS |
| FJG | No. 24 Elementary Flying Training School RAF | 24 EFTS |
| FJH | No. 24 Elementary Flying Training School RAF | 24 EFTS |
| FJJ | No. 28 Elementary Flying Training School RAF | 28 EFTS |
| FJK | No. 28 Elementary Flying Training School RAF | 28 EFTS |
| FJL | No. 28 Elementary Flying Training School RAF | 28 EFTS |
| FJN | No. 29 Elementary Flying Training School RAF | 29 EFTS |
| FJO | No. 29 Elementary Flying Training School RAF | 29 EFTS |
| FJP | No. 29 Elementary Flying Training School RAF | 29 EFTS |
| FJQ | No. 29 Elementary Flying Training School RAF | 29 EFTS |
| FJR | Central Gunnery School RAF | CGS |
| FJS | Central Gunnery School RAF | CGS |
| FJT | Central Gunnery School RAF | CGS |
| FJU | Central Gunnery School RAF | CGS |
| FJV | Central Gunnery School RAF | CGS |
| FJW | Central Gunnery School RAF | CGS |
| FJX | Central Gunnery School RAF | CGS |
| FK | No. 134 Squadron RAF | 134 Sqn |
| FK | No. 209 Squadron RAF | 209 Sqn |
| FK | No. 219 Squadron RAF | 219 Sqn |
| FKA | No. 1511 Beam Approach Training Flight RAF | 1511 B App.TFlt |
| FKB | No. 1511 Beam Approach Training Flight RAF | 1511 B App.TFlt |
| FKD | No. 1537 Beam Approach Training Flight RAF | 1537 B App.TFlt |
| FKF | No. 1547 Beam Approach Training Flight RAF | 1547 B App.TFlt |
| FKN | Flying Training Command Communication Flight RAF | FTCC Flt |
| FKO | No. 21 Group Communication Flight RAF | 21 Gp Comm Flt |
| FKP | No. 23 Group Communication Flight RAF | 23 Gp Comm Flt |
| FKQ | No. 25 Group Communication Flight RAF | 25 Gp Comm Flt |
| FKR | No. 54 Group Communication Flight RAF | 54 Gp Comm Flt |
| FKS | Station Flight RAF Cranwell | |
| FL | No. 155 Squadron RAF | 155 Sqn |
| FL | No. 81 Squadron RAF | 81 Sqn |
| FLA | Cambridge University Air Squadron | Camb UAS |
| FLB | Aberdeen University Air Squadron | Ab UAS |
| FLC | Edinburgh University Air Squadron | Edin UAS |
| FLD | Glasgow University Air Squadron | Glas UAS |
| FLE | Queens University Air Squadron | Queens UAS |
| FLF | St. Andrews University Air Squadron | St. And UAS |
| FLG | Liverpool University Air Squadron | Liv UAS |
| FLH | Manchester University Air Squadron | Man UAS |
| FLI | Leeds University Air Squadron | Leeds UAS |
| FLJ | Durham University Air Squadron | Dur UAS |
| FLK | Birmingham University Air Squadron | Birm UAS |
| FLL | Nottingham University Air Squadron | Nott UAS |
| FLM | Bristol University Air Squadron | Brist UAS |
| FLN | Swansea University Air Squadron | Swan UAS |
| FLO | London University Air Squadron | Lon UAS |
| FLO | University of London Air Squadron | ULUAS |
| FLP | Southampton University Air Squadron | Soton UAS |
| FLQ | Oxford University Air Squadron | Ox UAS |
| FLR | Perth University Air Squadron | Perth UAS |
| FLS | Wolverhampton University Air Squadron | Wolv UAS |
| FLT | Derby University Air Squadron | Der UAS |
| FLU | Yatesbury University Air Squadron | Yates UAS |
| FLV | Cambridge University Air Squadron | Camb UAS |
| FM | No. 238 Squadron RAF | 238 Sqn |
| FM | No. 257 Squadron RAF | 257 Sqn |
| FM | No. 518 Squadron RAF | 518 Sqn |
| FMA | No. 201 Advanced Flying School RAF | 201 AFS |
| FMB | No. 201 Advanced Flying School RAF | 201 AFS |
| FMC | No. 201 Advanced Flying School RAF | 201 AFS |
| FME | No. 202 Advanced Flying School RAF | 202 AFS |
| FMF | No. 202 Advanced Flying School RAF | 202 AFS |
| FMG | No. 202 Advanced Flying School RAF | 202 AFS |
| FMI | No. 203 Advanced Flying School RAF | 203 AFS |
| FMJ | No. 203 Advanced Flying School RAF | 203 AFS |
| FMK | No. 203 Advanced Flying School RAF | 203 AFS |
| FMO | No. 204 Advanced Flying School RAF | 204 AFS |
| FN | No. 125 Squadron RAF | 125 Sqn |
| FN | No. 331 Squadron RAF | 331 Norwegian Sqn |
| FN | No. 453 Squadron RAAF | 453 Sqn RAAF in Malaya/Singapore |
| FO | No. 1665 Conversion Unit RAF | 1665 CU |
| FO | No. 75 Squadron RAF | 85 Sqn |
| FO | Station Flight RAF Wick | |
| FP | No. 1683 Flight RAF | 1683 Flt |
| FQ | No. 12 Operational Training Unit RAF | 12 OTU |
| FR | No. 348 Squadron RAF | 348 Sqn |
| FR | Station Flight RAF Manston | |
| FS | No. 148 Squadron RAF | 148 Sqn |
| FS | No. 506 Squadron RAF | 506 Sqn |
| FT | No. 290 Squadron RAF | 290 Sqn |
| FT | No. 43 Squadron RAF | 43 Sqn |
| FT | Station Flight RAF Mildenhall | |
| FU | No. 453 Squadron RAAF | 453 Sqn RAAF ; in Europe |
| FU | No. 458 Squadron RAAF | 458 Sqn RAAF |
| FV | No. 13 Operational Training Unit RAF | 13 OTU |
| FV | No. 205 Squadron RAF | 205 Sqn |
| FV | No. 230 Squadron RAF | 230 Sqn |
| FW | No. 194 Squadron RAF | 194 Sqn |
| FW | Station Flight RAF Rivenhall | |
| FX | No. 234 Squadron RAF | 234 Sqn |
| FX | No. 266 Squadron RAF | 266 Sqn |
| FX | No. 34 Operational Training Unit RAF | 34 OTU |
| FX | No. 6 Squadron RAAF | 6 Sqn RAAF* |
| FY | No. 34 Operational Training Unit RAF | 34 OTU |
| FY | No. 4 Squadron RAF | 4 Sqn |
| FY | No. 611 Squadron RAF | 611 Sqn |
| FZ | No. 23 Operational Training Unit RAF | 23 OTU |
| FZ | No. 65 Squadron RAF | 65 Sqn |
| FZ | No. 94 Squadron RAF | 94 Sqn |
| G | Joint Anti-Submarine School Flight RAF | JASS Flt |
| G | No. 19 Flying Training School RAF | 19 FTS |
| G | No. 2 Flying Training School RAF | 2 FTS |
| G | No. 20 Squadron RAF | 20 Sqn |
| G | No. 4 Flying Training School RAF | 4 FTS |
| G | No. 43 Squadron RAF | 43 Sqn |
| G | No. 5 Flying Training School RAF | 5 FTS |
| G | No. 54 Squadron RAF | 54 Sqn |
| G | No. 6 Flying Training School RAF | 6 FTS |
| G | No. 81 Squadron RAF | 81 Sqn |
| G2 | No. 19 Group Communication Flight RAF | 19 Gp Comm Flt |
| G4 | Station Flight RAF Skellingthorpe | |
| G7 | Bomber Command Film Unit | BCFU |
| G8 | Station Flight RAF Wing | |
| G9 | No. 430 Squadron RCAF | 430 Sqn RCAF |
| GA | No. 112 Squadron RAF | 112 Sqn |
| GA | No. 16 Operational Training Unit RAF | 16 OTU |
| GA | No. 208 Squadron RAF | 208 Sqn |
| GA | No. 21 Squadron RAAF | 21 Sqn RAAF ; Malaya/Singapore. |
| GB | No. 100 Squadron RAF | 100 Sqn |
| GB | No. 105 Squadron RAF | 105 Sqn |
| GB | No. 166 Squadron RAF | 166 Sqn |
| GB | No. 83 Squadron RAF | 83 Sqn |
| GB | No. 97 Squadron RAF | 97 Sqn |
| GC | Station Flight RAF Pershore | |
| GD | Station Flight RAF Horsham St Faith | |
| GE | No. 349 Squadron RAF | 349 |
| GE | No. 58 Squadron RAF | 58 Sqn |
| GF | No. 1 Tactical Exercise Unit RAF | 1 TEU |
| GF | No. 56 Operational Training Unit RAF | 56 OTU |
| GG | No. 151 Squadron RAF | 151 Sqn |
| GG | No. 1667 Conversion Unit RAF | 1667 CU |
| GH | No. 285 Squadron RAF | 285 Sqn |
| GI | No. 622 Squadron RAF | 622 Sqn |
| GK | No. 459 Squadron RAAF | 459 Sqn RAAF |
| GK | No. 52 Operational Training Unit RAF | 52 OTU |
| GK | No. 80 Squadron RAF | 80 Sqn |
| GL | No. 14 Operational Training Unit RAF | 14 OTU |
| GL | No. 1529 Flight RAF | 1529 Flt |
| GL | 5 Squadron SAAF | 5 Sqn SAAF |
| GL | No. 175 Squadron RAF | 175 Sqn |
| GL | No. 185 Squadron RAF | 185 Sqn |
| GL | Station Flight RAF Duxford | |
| GM | No. 55 Squadron RAF | 55 Sqn |
| GM | No. 74 Squadron RAF | 84 Sqn |
| GN | Central Bomber Establishment RAF | CBE |
| GN | No. 249 Squadron RAF | 249 Sqn |
| GN | No. 323 Squadron RAF | 323 Sqn |
| GO | Central Fighter Establishment RAF | CFE |
| GO | No. 135 Squadron RAF | 135 Sqn |
| GO | No. 94 Squadron RAF | 94 Sqn |
| GP | No. 1661 Conversion Unit RAF | 1661 CU |
| GP | No. 187 Squadron RAF | 187 Sqn |
| GQ | No. 134 Squadron RAF | 134 Sqn |
| GQ | Station Flight RAF North Killingholme | |
| GR | No. 1586 Flight RAF | 1586 Flt |
| GR | No. 301 Polish Bomber Squadron | 301 Polish Sqn |
| GR | No. 92 Squadron RAF | 92 Sqn |
| GS | No. 190 Squadron RAF | 190 Sqn |
| GS | No. 297 Squadron RAF | 297 Sqn |
| GS | No. 330 Squadron RAF | 330 Norwegian Sqn |
| GS | No. 83 Operational Training Unit RAF | 83 OTU |
| GT | No. 156 Squadron RAF | 156 Sqn |
| GT | No. 344 Squadron RAF | 344 French Sqn |
| GU | No. 18 Squadron RAF | 18 Sqn |
| GV | No. 103 Squadron RAF | 103 Sqn |
| GV | No. 1652 Conversion Unit RAF | 1652 CU |
| GW | No. 252 Squadron RAF | 252 Sqn |
| GW | No. 340 Squadron RAF | 340 French Sqn |
| GX | No. 415 Squadron RCAF | 415 Sqn RCAF |
| GX | No. 507 Squadron RAF | 507 Sqn |
| GX | Station Flight RAF Broadwell | |
| GY | No. 109 Operational Training Unit RAF | 109 OTU |
| GY | No. 1383 Conversion Unit RAF | 1383 CU |
| GZ | No. 12 Squadron RAF | 12 Sqn |
| GZ | No. 32 Squadron RAF | 32 Sqn |
| GZ | No. 611 Squadron RAF | 611 Sqn |
| H | No. 111 Squadron RAF | 111 Sqn |
| H | No. 1340 Flight RAF | 1340 Flt |
| H | No. 19 Flying Training School RAF | 19 FTS |
| H | No. 4 Flying Training School RAF | 4 FTS |
| H | No. 5 Advanced Flying Unit | 5 AFU |
| H | School of Maritime Reconnaissance RAF | S OF MR |
| H7 | No. 346 Squadron RAF | 346 French Sqn |
| H8 | No. 42 Squadron RAF | 42 Sqn |
| H9 | Station Flight RAF Shepherds Grove | |
| HA | No. 218 Squadron RAF | 218 Sqn |
| HA | No. 649 Squadron RAF | 649 Sqn |
| HB | No. 229 Squadron RAF | 229 Sqn |
| HB | No. 239 Squadron RAF | 239 Sqn |
| HC | No. 512 Squadron RAF | 512 Sqn |
| HD | No. 311 Squadron RAF | 311 Czech Sqn |
| HD | No. 38 Squadron RAF | 38 Sqn |
| HD | No. 466 Squadron RAAF | 466 Sqn RAAF |
| HE | No. 263 Squadron RAF | 263 Sqn |
| HE | No. 605 Squadron RAF | 605 Sqn |
| HF | No. 127 Squadron RAF | 127 Sqn |
| HF | No. 183 Squadron RAF | 183 Sqn |
| HF | No. 54 Squadron RAF | 54 Sqn |
| HG | No. 154 Squadron RAF | 154 Sqn |
| HG | No. 332 Squadron RAF | 332 Sqn |
| HH | No. 175 Squadron RAF | 175 Sqn |
| HH | No. 273 Squadron RAF | 273 Sqn |
| HI | No. 63 Operational Training Unit RAF | 63 OTU |
| HI | No. 66 Squadron RAF | 66 Sqn |
| HJ | No. 254 Squadron RAF | 254 Sqn |
| HK | Fighter Leaders School RAF | FLS |
| HK | No. 269 Squadron RAF | 269 Sqn |
| HK | No. 306 Squadron RAF | 306 Polish Sqn |
| HL | No. 26 Squadron RAF | 26 Sqn |
| HL | Station Flight RAF Gransden Lodge | |
| HM | No. 136 Squadron RAF | 136 Sqn |
| HM | No. 1667 Flight RAF | 1667 Flt |
| HN | No. 20 Squadron RAF | 20 Sqn |
| HN | No. 93 Squadron RAF | 93 Sqn |
| HP | Gunnery Research Unit RAF | GRU |
| HP | No. 247 Squadron RAF | 247 Sqn |
| HP | Station Flight RAF Full Sutton | |
| HQ | No. 56 Operational Training Unit RAF | 56 OTU |
| HQ | No. 91 Squadron RAF | 91 Sqn |
| HR | North-East Sector Communication Flight RAF | N-ES Comm Flt |
| HS | No. 109 Squadron RAF | 109 Sqn |
| HS | No. 170 Squadron RAF | 170 Sqn |
| HS | No. 260 Squadron RAF | 260 Sqn |
| HT | No. 154 Squadron RAF | 154 Sqn |
| HT | No. 158 Squadron RAF | 158 Sqn |
| HT | No. 601 Squadron RAF | 601 Sqn |
| HU | No. 220 Squadron RAF | 220 Sqn |
| HU | No. 406 Squadron RCAF | 406 Sqn RCAF |
| HV | No. 73 Squadron RAF | 83 Sqn |
| HV | No. 8 Squadron RAF | 8 Sqn |
| HV | Station Flight RAF East Kirkby | |
| HW | No. 100 Squadron RAF | 100 Sqn |
| HX | No. 203 Advanced Flying School RAF | 203 AFS |
| HX | No. 226 Operational Conversion Unit RAF | 226 OCU |
| HX | No. 295 Squadron RAF | 295 Sqn |
| HX | No. 61 Operational Training Unit RAF | 61 OTU |
| HY | No. 88 Squadron RAF | 88 Sqn |
| HZ | No. 44 Group Communication Flight RAF | 44 Gp Comm Flt |
| I | Central Flying School | CFS |
| I2 | No. 48 Squadron RAF | 48 Sqn |
| I4 | No. 567 Squadron RAF | 567 Sqn |
| I5 | No. 105 Operational Training Unit RAF | 105 OTU |
| I5 | No. 1381 Conversion Unit RAF | 1381 CU |
| I6 | No. 32 Maintenance Unit RAF | 32 MU |
| I8 | No. 440 Squadron RCAF | 440 Sqn RCAF |
| I9 | No. 575 Squadron RAF | 575 Sqn |
| IA | Station Flight RAF Syerston | |
| IB | Glider pick-up Training Flight RAF | GPUT Flt |
| IB | No. 43 Group Communication Flight RAF | 43 Gp Comm Flt |
| IC | No. 623 Squadron RAF | 623 Sqn |
| IF | No. 84 Operational Training Unit RAF | 48 OTU |
| II | No. 116 Squadron RAF | 116 Sqn |
| II | No. 59 Operational Training Unit RAF | 59 OTU |
| IK | Bomber Command Instructors School RAF | BCIS |
| IL | No. 115 Squadron RAF | 115 Sqn |
| IN | Station Flight RAF Valley | |
| IP | Bomber Command Instructors School RAF | BCIS |
| IQ | No. 150 Squadron RAF | 150 Sqn |
| IV | Station Flight RAF Upper Heyford | |
| IW | Station Flight RAF Chilbolton | |
| IY | Station Flight RAF Dunsfold | |
| J | No. 111 Operational Training Unit RAF | 111 OTU |
| J | No. 26 Squadron RAF | 26 Sqn |
| J | No. 27 Squadron RAF | 27 Sqn |
| J | RAF College Flying Training School | RAF Coll FTS |
| J5 | No. 3 Squadron RAF | 3 Sqn |
| J6 | No. 1521 Flight RAF | 1521 Flt |
| J7 | No. 8 Maintenance Unit RAF | 8 MU |
| J8 | No. 24 Maintenance Unit RAF | 24 MU |
| J9 | No. 1668 Conversion Unit RAF | 1668 CU |
| JA | No. 1652 Conversion Unit RAF | 1652 CU |
| JB | No. 1380 Conversion Unit RAF | 1380 CU |
| JB | No. 190 Squadron RAF | 190 Sqn |
| JB | No. 81 Operational Training Unit RAF | 81 OTU |
| JC | No. 11 Group Communication Flight RAF | 11 Gp Comm Flt |
| JD | Station Flight RAF Grimsetter | |
| JE | No. 195 Squadron RAF | 195 Sqn |
| JE | No. 610 Squadron RAF | 610 Sqn |
| JF | No. 1654 Conversion Unit RAF | 1654 CU |
| JF | No. 3 Squadron RAF | 3 Sqn |
| JG | No. 17 Operational Training Unit RAF | 17 OTU |
| JH | No. 317 Squadron RAF | 317 Polish Sqn |
| JH | No. 74 Squadron RAF | 84 Sqn |
| JI | No. 514 Squadron RAF | 514 Sqn |
| JJ | No. 160 Squadron RAF | 160 Sqn |
| JJ | No. 274 Squadron RAF | 274 Sqn |
| JL | No. 10 Operational Training Unit RAF | 10 OTU |
| JL | No. 520 Squadron RAF | 520 Sqn |
| JM | No. 184 Squadron RAF | 184 Sqn |
| JM | No. 20 Operational Training Unit RAF | 20 OTU |
| JM | No. 32 Squadron RAAF | 32 Sqn RAAF* |
| JN | No. 150 Squadron RAF | 150 Sqn |
| JN | No. 268 Squadron RAF | 268 Sqn |
| JN | No. 30 Squadron RAF | 30 Sqn |
| JN | No. 75 Squadron RAF | 85 Sqn |
| JO | No. 463 Squadron RAAF | 463 Sqn RAAF |
| JO | No. 62 Squadron RAF | 62 Sqn |
| JP | No. 12 Operational Training Unit RAF | 12 OTU |
| JP | No. 21 Squadron RAF | 21 Sqn |
| JQ | No. 169 Squadron RAF | 169 Sqn |
| JQ | No. 2 Anti-aircraft Co-operation Unit RAF | 2 AACU |
| JQ | Station Flight RAF Breighton | |
| JR | No. 161 Squadron RAF | 161 Sqn |
| JS | No. 16 Operational Training Unit RAF | 16 OTU |
| JS | No. 321 Squadron RAF | 321 Dutch Sqn |
| JT | No. 182 Squadron RAF | 182 Sqn |
| JT | No. 256 Squadron RAF | 256 Sqn |
| JU | No. 111 Squadron RAF | 111 Sqn |
| JU | No. 202 Squadron RAF | 202 Sqn |
| JV | No. 283 Squadron RAF | 283 Sqn |
| JV | No. 6 Squadron RAF | 6 Sqn |
| JV | Station Flight RAF Finningley | |
| JW | Central Fighter Establishment | CFE |
| JW | No. 44 Squadron RAF | 44 Sqn |
| JX | No. 1 Squadron RAF | 1 Sqn |
| JY | No. 121 Squadron RAF | 121 Sqn |
| JZ | No. 57 Operational Training Unit RAF | 57 OTU |