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Air Defence Great Britain

At first the AA Divisions came under HQ AA Command.
In Nov 40 the 3 AA Corps were introduced.
Finally in Oct 42 the Corps and Divisions were replaced by 7 AA Groups.

Formed 1935

London

1 AA Corps

2 AA Corps

1 AA Division

5 AA Division

Portsmouth
&
Southampton

Formed 1938

Thames Estuary
Essex
&
North Kent

Plymouth
Bristol
&
Exeter

Cardiff
&
South Wales
Ports

Formed 1939

Formed 1940

Formed 1940

6 AA Division

8 AA Division

9 AA Division

2 AA Division

4 AA Division

10 AA Division

11 AA Division

East Midlands
&
N East Anglia

Formed 1936

Birmingham
then
Manchester
&
Liverpool

Formed 1938

Humber

Formed 1940

Birmingham
Coventry
&
West/Central Midlands

Formed 1940

3 AA Division

12 AA Division

7 AA Division

HQ Anti-Aircraft Command (This badge was adopted by all AA formations in 1943)

Scotland

Formed 1938

Tyne-Tees

Formed 1939

SW Scotland
&
N Ireland

Formed 1940

3 AA Corps

For a breakdown of Gun Defended Areas
and maps of HAA sites see here

HAA sites