page_title: 42nd Anti-Aircraft Brigade (United Kingdom)
section_title: Order of Battle 1940–41
hierarchical_section_title: 42nd Anti-Aircraft Brigade (United Kingdom) / The Blitz / Order of Battle 1940–41
caption_attribution_description: A British QF 3.7 inch anti-aircraft gun at RAF Duxford
context_page_description: 42nd Anti-Aircraft Brigade was an air defence formation of Britain's Territorial Army. It was responsible for protecting the City of Glasgow and industry along the Firth of Clyde during World War II.
context_section_description: By this stage of the war, 42nd AA Bde's order of battle was as follows:
  71st (Forth) HAA Rgt  – from 3 AA Division May 1941
  209, 210, 311 HAA Btys
  83rd HAA Rgt – left Summer 1941; later to Tenth Army in Iraq
  257, 258, 259 HAA Btys
  100th HAA Rgt
  304, 305, 321, 406 HAA Btys
  111th HAA Rgt – new regiment formed October 1940; to 3 AA Bde (Northern Ireland) June 1941
  347, 356, 389 HAA Btys
  355 HAA Bty – attached to 3 AA Bde
  123rd HAA Rgt – new regiment formed  in February 1941
  402, 403, 404, 417 HAA Btys
  18th LAA Rgt – New regiment formed at Glasgow September 1939; attached to 63 AA Bde May 1941
  99, 139, 252 LAA Btys at Glasgow
  56 LAA Bty at Ardeer
  60th LAA Rgt – New regiment formed November 1940 to 63 AA Bde by May 1941
  180, 181, 187 LAA Btys
  (By this time, 74th HAA Rgt was on its way to Egypt.)
caption: QF 3.7-inch AA gun preserved at Imperial War Museum Duxford.
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