Air of Authority - A History of RAF Organisation
No 2 (Bomber) Group (HQ - Huntingdon)
| Unit | Location/Administered by |
| RAF Station Horsham St Faith | Horsham St Faith, Norfolk |
| No 114 (Bomber) Sqn | RAF Horsham St Faith |
| No 139 (Bomber) Sqn | RAF Horsham St Faith |
| RAF Station Wattisham | Wattisham, Suffolk |
| No 107 (Bomber) Sqn | RAF Wattisham |
| No 110 (Bomber) Sqn | RAF Wattisham |
| RAF Station Watton | Watton, Norfolk |
| No 21 (Bomber) Sqn | RAF Watton |
| No 82 (Bomber) Sqn | RAF Watton |
| RAF Station West Raynham* | West Raynham, Norfolk |
| No 18 (Bomber) Sqn (R) | RAF West Raynham |
| No 101 (Bomber) Sqn (R) | RAF West Raynham |
| No 2 Group Target Towing Flights (Battles) | RAF West Raynham |
| RAF Station Wyton | Wyton, Huntingdonshire |
| No 57 (Bomber) Sqn | RAF Wyton |
| No 15 (Bomber) Sqn | RAF Wyton |
| No 40 (Bomber) Sqn | RAF Wyton |
All squadrons equipped with Blenheims
(R) = Reserve Squadron - Two of the three flights in these squadrons are available for operations in emergency
No 3 (Bomber) Group (HQ - Exning, Newmarket)
| Unit | Location/Administered by |
| RAF Station Feltwell | Feltwell, Norfolk |
| No 37 (Bomber) Sqn | RAF Feltwell |
| No 75 (New Zealand) Sqn | RAF Feltwell |
| RAF Station Honington | Honington, Suffolk |
| No 9 (Bomber) Sqn | RAF Honington |
| No 105 (Bomber) Sqn (Battles) | RAF Honington |
| RAF Station Marham | Marham, Norfolk |
| No 38 (Bomber) Sqn | RAF Marham |
| No 115 (Bomber) Sqn | RAF Marham |
| No 3 Group Target Towing Flight (Battles) | RAF Marham |
| RAF Station Mildenhall | Mildenhall, Suffolk |
| No 99 (Bomber) Sqn | RAF Mildenhall |
| No 149 (Bomber) Sqn | RAF Mildenhall |
| RAF Station Stradishall | Stradishall, Suffolk |
| No 218 (Bomber) Sqn | RAF Stradishall |
| No 214 (Bomber) Sqn (R) | RAF Stradishall |
All squadrons equipped with Wellingtons
(R) = Reserve Squadron - Two of the three flights in these squadrons are available for operations in emergency
No 4 (Bomber) Group (HQ - York)
| Unit | Location/Administered by |
| RAF Station Dishforth | Dishforth, North Riding of Yorkshire |
| No 10 (Bomber) Sqn | RAF Dishforth |
| No 51 (Bomber) Sqn (R) | RAF Dishforth |
| RAF Station Driffield | Driffield, East Riding of Yorkshire |
| No 77 (Bomber) Sqn | RAF Driffield |
| No 102 (Bomber) Sqn | RAF Driffield |
| No 4 Group Target Towing Flight (Battles) | RAF Driffield |
| RAF Station Linton-on-Ouse | Linton-on-Ouse, North Riding of Yorkshire |
| No 78 (Bomber) Sqn | RAF Linton-on-Ouse |
| No 58 (Bomber) Sqn | RAF Linton-on-Ouse |
| RAF Station Leeming (opens 1 Jun 1940) | Leeming, North Riding of Yorkshire |
All squadrons equipped with Whitleys
(R) = Reserve Squadron - Two of the three flights in these squadrons are available for operations in emergency
No 5 (Bomber) Group (HQ - 'St Vincents', Grantham)
| Unit | Location/Administered by |
| RAF Station Finningley | Finningley, West Riding of Yorkshire |
| No 106 (Bomber) Sqn (R) | RAF Finningley |
| RAF Station Hatfield Woodhouse | Hatfield Woodhouse, West Riding of Yorkshire |
| No 50 (Bomber) Sqn | RAF Hatfield Woodhouse |
| RAF Station Hemswell | Hemswell, Lincolnshire |
| No 61 (Bomber) Sqn | RAF Hemswell |
| No 144 (Bomber) Sqn | RAF Hemswell |
| RAF Station Scampton | Scampton, Lincolnshire |
| No 49 (Bomber) Sqn | RAF Scampton |
| No 83 (Bomber) Sqn | RAF Scampton |
| RAF Station Waddington | Waddington, Lincolnshire |
| No 44 (Bomber) Sqn | RAF Waddington |
| No 5 Group Target Towing Flight (Battles) | RAF Waddington |
| No 271 (Transport) Sqn (Various) | RAF Doncaster |
All squadrons equipped with Hampdens
(R) = Reserve Squadron - Two of the three flights in these squadrons are available for operations in emergency
No 6 (Auxiliary) Group (HQ - Norwich)
| Unit | Location |
| RAF Station Abingdon | Abingdon, Berkshire |
| No 10 Operational Training Unit - Whitleys | RAF Abingdon (administers by Code & Cypher School, Oxford - No 26 Group) |
| RAF Station Bassingbourn | Bassingbourn, Cambridgeshire |
| No 11 Operational Training Unit - Wellingtons | RAF Bassingbourn |
| RAF Station Benson | Benson, Oxfordshire |
| No 12 Operational Training Unit - Battles | RAF Benson |
| RAF Station Bicester | Bicester, Oxfordshire |
| No 13 Operational Training Unit - Blenheims | RAF Bicester |
| No 6 Group Target Towing Flight - Battles | RAF Bicester |
| RAF Station Cottesmore | Cottesmore, Rutland |
| No 14 Operational Training Unit - Hampdens | RAF Cottesmore |
| RAF Station Harwell | Harwell, Oxfordshire |
| No 15 Operational Training Unit - Wellingtons | RAF Harwell |
| RAF Station Hucknall | Hucknall, Nottinghamshire |
| No 18 (Polish) Operational Training Unit - Battles | RAF Hucknall |
| RAF Station Kinloss | Kinloss, Morayshire |
| No 19 Operational Training Unit - Whitleys | RAF Kinloss |
| RAF Station Lossiemouth | Lossiemouth, Morayshire |
| No 19 Operational Training Unit - Whitleys | RAF Lossiemouth |
| RAF Station Upper Heyford | Upper Heyford, Oxfordshire |
| No 16 Operational Training Unit - Hampdens | RAF Upper Heyford |
| RAF Station Upwood | Upwood, Huntingdonshire |
| No 17 Operational Training Unit - Blenheims | RAF Upwood |
| RAF Station Bramcote | |
| 2 Polish squadrons to form in July 1940 |
All OTUs have Ansons in addition to their operation type.
The following squadrons of Bomber Command have been reduced to a 'number only' basis until it becomes practicable to reform them as operational units
| No 166 (Bomber) Sqn |
| No 52 (Bomber) Sqn |
| No 63 (Bomber) Sqn |
| No 104 (Bomber) Sqn |
| No 108 (Bomber) Sqn |
| No 35 (Bomber) Sqn |
| No 90 (Bomber) Sqn |
| No 207 (Bomber) Sqn |
| No 215 (Bomber) Sqn |
| No 148 (Bomber) Sqn |
| No 97 (Bomber) Sqn |
| No 185 (Bomber) Sqn |
| No 76 (Bomber) Sqn |
| No 7 (Bomber) Sqn |
Source - SD161 (3rd Issue), May 1940, Amendment List No 1 dated 20 Jun 1940
County names used are those in use at the time
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