604 Sqn (County of Middlesex)
Formed at Hendon 17 March 1930
From July 1940:
Aircraft: Gladiator I; Blenheim If; Beaufighter If

Code: NG
Stationed:

    Northolt 20/6/40 to 3/7/40
    Gravesend 3/7/40 to 27/7/40
    Middle Wallop 27/7/40 to 12/8/42

Remarks:

 

 

 

 

605 Sqn (County of Warwick)
Formed at Usworth 17 March 1930
From July 1940:
Aircraft: Hurricane I

Code: UP
Stationed:

    Drem 28/5/40 to 7/9/40
    Croydon 24/8/40 to Nov 40

Remarks:
Flt Lt A A McKeller DSO DFC/ 14½

 

 

 

 

 

607 Sqn (County of Durham)
Formed at Usworth 17 March 1925
From July 1940:
Aircraft: Hurricane I

Code: AF
Stationed:

    Usworth 4/6/40 to 1/9/40
    Tangmere 1/9/40 to 10/10/40
    Turnhouse 10/10/40 to 8/11/40

Remarks:
P/O H C Upton DFC 10½

 

 

 

 

 

609 Sqn (West Riding)
Formed at Yeadon 10 February 1936
From July 1940:
Aircraft: Spitfire I

Code: PR
Stationed:

    Northolt 20/5/40 to 6/7/40
    Middle Wallop 6/7/40 to 2/10/40
    Warmwell 2/10/40 to 24/2/41

Remarks:

 

 

 

 

 

610 Sqn (County of Chester)
Formed at Hendon 10 February 1936
From July 1940:
Aircraft: Spitfire I

Code: DW
Stationed:

    Gravesend 27/5/40 to 8/7/40
    Biggin Hill 8/7/4 to 31/8/40
    Acklington 31/8/40 to 15/12/41

Remarks:

 

 

 

 

 

611 Sqn (West Lancashire)
Formed at Hendon 10 February 1936
From July 1940:
Aircraft: Spitfire I

Code: FY
Stationed:

    Digby/North Coates/Ternhill 10/10/39 to 13/12/40

Remarks:

 

 

 

 

 

615 Sqn (County of Surrey)
Formed at Kenley 1 June 1937
From July 1940:
Aircraft: Hurricane I; Gladiator II

Code: KW
Stationed:

    Kenley/Manston (Gladiator) 22/5/40 to 29/8/40
    Prestwick 29/8/40 to 10/10/40
    Northolt 10/10/4 to 16/12/40

Remarks:

 

 

 

 

 

616 Sqn (South Yorkshire)
Formed at Doncaster 1 November 1938
From July 1940:
Aircraft: Spitfire I

Code: YQ
Stationed:

    Leconfield 6/6/40 to 19/840
    Kenley 19/8/40 to 3/9/40
    Coltishall 3/9/40 to 9/9/40
    Kirton on Lindsey 9/9/40 to 26/2/41

Remarks:

 

 

 

 

 

421 Flt
Formed at Hawkinge
From 1 October 1940:
Aircraft: Spitfire MkIIa , Hurricane MkI

Code: L-Z and DL
Stationed: Hawkinge

Remarks: Reconnaisance flight. Reformed as 91 Sqn

 

 

 

 

 

 

Fighter Interception Unit (FIU)
Formed at Tangmere
From April 1940:
Aircraft: Blenheim1f, Beaufighter, Hurricane I

Code:
Stationed: Tangmere
Det Shoreham
Det Newchurch:

Remarks:

   

 

 

 

 

 

 

 

 

 

804 Sqn (FAA)
Formed at RNAS Hatston
From April 1940:
Aircraft: Sea Gladiator, Martlet I

Code:
Stationed: RNAS Hatston,

Remarks: