11 Group / Air Vice Marshal Keith Park / Uxbridge Middlesex SECTOR SQN AIRCRAFT BASE COMMANDER Biggin Hill 72 Spitfire Biggin Hill S/L A.R. Collins  . 92 Spitfire Biggin Hill S/L F.J. Sanders   . 66  Spitfire Gravesend S/L R.H.A. Leigh  . 141 Defiant Biggin Hill S/L W.A. Richardson North Weald 249 Hurricane North Weald S/L J. Grandy  . 46 Hurricane Stapleford S/L J.R. MacLachlan  . 23 Blenheim North Weald S/L G.F.W. Heycock  . 23 half Beaufighter North Weald S/L G.F.W. Heycock Kenley 253 Hurricane Kenley S/L E.R. Bitmead  . 501 Hurricane Kenley S/L H.A.V. Hogan  . 605 Hurricane Croydon S/L W.M. Churchill Hornchurch 603 Spitfire Hornchurch S/L G.L. Denholm  . 41 Spitfire Hornchurch S/L R.C. Lister  . 222 Spitfire Hornchurch S/L L.H. Hill  . 600 Blenheim/Beaufighter Hornchurch S/L H.L. Maxwell Tangmere 213 Hurricane Tangmere S/L D.S. Wilson-McDonald  . 607 Hurricane Tangmere S/L J.A. Vick  . 602 Spitfire Westhampnett S/L A.V.R. Johnstone  . 23 half Blenhein/Beaufighter Ford S/L G.F.W. Heycock Debden 17 Hurricane Debden S/L A.G. Miller  . 73 Hurricane Debden S/L M.L. Beytagh   257 Hurricane Martlesham S/L R. Stanford-Tuck   25 half Blenheim Martlesham S/L W.W. Loxton Northolt 1 RCAF Hurricane Northolt S/L E.A. McNab  . 229 Hurricane Northolt S/L H.J. Maguire . 303* Hurricane Northolt S/L R. Kellett    264 Defiant Northolt S/L G.D. Garvin   504 Hurricane Hendon S/L J. Sample * 303 Squadron was the famous and very successful Polish squadron   10 Group / Air Vice Marshal Sir Christopher Brand / Box, Wiltshire  SECTOR SQN  AIRCRAFT  BASE COMMANDER  Filton 79 Hurricane Pembury S/L J.H. Heyworth Middle Wallop 238 Hurricane Middle Wallop S/L H. Fenton  . 609 Spitfire Warmwell S/L H. Darley  . 604 Blenheim/Beaufighter Middle Wallop S/L M. Anderson  . 152 Spitfire Warmwell S/L P. Devitt   56 Hurricane Boscome Down S/L H.M. Pinfold   23 half Blenheim Middle Wallop S/L G.F.W. Heycock St Eval 234 Spitfire St Eval S/L M.V. Blake  . 247 Gladiator Roborough F/L H.A. Chater Exeter 87 Hurricane Exeter/Bilbury S/L R.S. Mills   601 Hurricane Filton S/L Sir Archibald Hope   12 Group / Air Vice Marshal Trafford Leigh-Mallory / Watnall, Nottinghamshire SECTOR SQN AIRCRAFT BASE COMMANDER Duxford 242 Hurricane Duxford S/L D. Bader  . 302 Hurricane Duxford S/L W.A.J. Satchell-S/L M. Mumler   310 Hurricane Duxford S/L G.D.M. Blackwood-S/L A. Hess   19 Spitfire Fowlmere S/L B.J.E  Lane Coltishall 74 Spifire Wittering S/L A.G (Sailor) Malan Kirton-in-Lindsay 616 Spitfire Kirton S/L W. Burton  . 264 half Defiant Kirton S/L G.D. Garvin Digby 151 Hurricane Digby Not known at this stage  . 611 Spitfire Digby S/L J. McCoomb  . 29 Blenheim/Beaufighter Digby S/L S. Widdows Wittering 1 Hurricane Wittering S/L D.A. Pemberton  . 266 Spitfire Wittering None. S/L P. Jamison 17-9-40 Church Fenton 85 Hurricane Church Fenton S/L P.W. Townsend  . 306* Hurricane Church Fenton Not known at this stage  . 64 Spitfire Leconfield S/L D. McDonnell * 306 Squadron flew only one squadron that was operational.   13 Group / Air Vice Marshal Richard Saul / Newcastle, Northumberland SECTOR SQN AIRCRAFT BASE COMMANDER Catterick 54 Spitfire Catterick F/L F.P.L. Dunworth  . 219 half Blenheim/Beaufighter Catterick S/L J.H. Little Usworth 43 Hurricane Usworth None. S/L T. Dalton from 16-9-40  . 32 Hurricane Acklington S/L M.N. Crossley  . 610 Spitfire Acklington S/L J. Ellis   219 half Blenheim Acklington S/L J.H. Little Turnhouse 3 Hurricane Turnhouse S/L S.F. Godden  . 65 Spitfire Turnhouse S/L A.L. Holland  . 141 Defiant Turnhouse S/L W.A. Richardson   111  Hurricane Drem S/L J.M. Thompson   263 Hurricane/Whirlwind Drem S/L T.P. Pugh Dyce 145 Hurricane Dyce/Montrose S/L J.R.A. Peel Wick 232 Hurricane Sumburgh F/L M.M. Stephens Aldergrove 245 Hurricane Aldergrove S/L E.W. Whitley *This squadron later converted over to Whirlwind aircraft. BOBHSOC The Luftwaffe Order of Battle at 7th September 1940 LUFTFLOTTE 2 based in France north of the Seine, Belgium and Holland Messerschmitt Bf 109 single engined fighter GRUPPE AIRCRAFT AVAILABLE BASE 1/JG 3 Bf 109E 14 Pas de Calais 11/JG 3 Bf 109E 21 Pas de Calais 111/JG 3 Bf 109E 23 Pas de Calais 1/JG 26 Bf 109E 20 Pas de Calais Stab JG 1 Bf 109E 3 Pas de Calais Stab JG 3 Bf 109E 3 Pas de Calais Stab JG 26 Bf 109E 3 Pas de Calais 11/JG 26 Bf 109E 28 Northern France 111/JG 26 Bf 109E 26 Northern France Stab JG 27 Bf 109E 4 Etaples 1/JG 27 Bf 109E 27 Etaples 11/JG 27 Bf 109E 33 Montreuil 111/JG 27 Bf 109E 27 Sempy Stab JG 51 Bf 109E 4 St Omer 1/JG 51 Bf 109E 33 St Omer 11/JG 51 Bf 109E 13 St Omer 111/JG 51 Bf 109E 31 Pas de Calais 1/JG 52 Bf 109E 17 Laon/Couvron Stab JG 52 Bf 109E 1 Laon/Couvron 11/JG 52 Bf 109E 23 Pas de Calais 111/JG 52 Bf 109E 16 Pas de Calais Stab JG 54 Bf 109E 2 Northern France 1/JG 54 Bf 109E 23 Southern Holland 11/JG 54 Bf 109E 27 Southern Holland 111/JG 54 Bf 109E 23 Southern Holland 1/JG 77 Bf 109E 40 Northern France Messerschmitt Bf 110 twin engined fighters GRUPPE AIRCRAFT AVAILABLE BASE Stab ZG 2 Bf 110 N/A Not Known 1/Zg 2 Bf 110 10 Amiens and Caen 11/ZG 2 Bf 110 10 Guyancourt/Caudran Stab ZG 26 Bf 110 3 Not Known 1/ZG 26 Bf 110 14 Abbeville 11/ZG 26 Bf 110 17 Crecy-en-Ponthieu 111/ZG 26 Bf 110 17 Barley and Arques V(Z)LG 1 Bf 110 19 Ligescourt Erprobungsgruppe 210 Bf 110 Bf 109E 17 Denain Long Range Reconnaissance Aircraft GRUPPE AIRCRAFT AVAILABLE BASE 1(F)/ 22 Do 17 and Bf 110 9 Lille 1(F)/ 122 Ju 88 3 Holland 2(F)/ 122 Ju 88 and He 111 9 Brussels/Melsbruek 3(F)/ 122 Ju 88 and He 111 10 Einhoven 4(F)/ 122 Ju 88 He 111 Bf 110 9 Brussels 5(F)/ 122 Ju 88 and He 111 11 Haute-Fontaine Luftwaffe Bomber Units GRUPPE/AIRCRAFT BASE I/KG 1 He111 Montdidier II/KG 1 He 111 Montdidier III/KG 1 He 111 Rosieres-en-Santerre I/KG 2 Do 17 Epinoy II/KG 2 Do 17 Arras III/KG 2 Do 17 Cambrai I/KG 3 Do 17 Le Culot II/KG 3 Do 17 Antwerp/Deurne III/KG 3 Do 17 St Truiden I/KG 4 He 111 Soesterberg II/KG 4 He 111 Eindhoven III/KG 4 Ju 88 Amsterdam/Schipol I/KG 53 He 111 Lille II/KG 53 He 111 Lille III/KG 53 He111 Lille I/KG 76 Do 17 Beauvais II/KG 76 Ju 88 Creil III/KG 76 Cormeilles-en-Vexin