 Bofors guns, and 469 light machine guns (LMGs), together with 244 searchlights. The HAA guns were deployed in the defended areas as follows:

 Liverpool	– 19 (plus 3 out of action)
 Manchester	– 12 (plus 10 out of action)
 Birmingham	– 20 (plus 4 out of action)
 Coventry	–12
 Cardiff	– 6 (plus 2 out of action)
 Newport	– 4

Phoney War
During the period of the Phoney War, the AA defences of NW England were not tested in action, and the time was spent in equipping and training the TA units. AA Command also had to provide equipment and units to the British Expeditionary Force assembling in France. From the 4th AA Division, the 73rd AA Regiment went to France in November 1939 where it joined the 12th Anti-Aircraft Brigade providing AA cover for the airfields of the RAF's Advanced Air Striking Force. In January 1940, Maj-Gen Martin went to command the AA defences of the BEF. He was replaced by Maj-Gen Charles Cadell, recently returned from commanding the AA defences of Malaya.

Battle of Britain
In the summer of 1940, all AA units equipped with 3-inch or heavier guns were designated as Heavy AA (HAA) regiments to distinguish them from the newer LAA units. Also, in August the AA battalions were transferred from the RE to the RA, which designated them searchlight regiments.

Deployment
At the start of the Battle of Britain, in July 1940, the 4th AA Division's guns were deployed as follows:
 Liverpool	– 52
 Manchester – 20
 Crewe	– 8
 Birmingham	– 64
 Coventry	– 44 
 RAF Ringway – 4
 Vital Points – 52 (mainly LAA)

Reorganisation
In September 1940, the 4th AA Division formed the 4th AA Z Regiment to command the new short-range rocket weapons known as Z Batteries. Also in September 1940, RAF Fighter Command created a new HQ (No. 9 Group RAF) to cover NW England, and henceforth the 4th AA Division cooperated with it.

As the Battle of Britain fought over southern England in the summer of 1940 developed into the night bombing of the Blitz in the autumn, AA Command continued to expand. In November a new division was formed by splitting the 34th and
Bofors guns, and 469 light machine guns (LMGs), in concert with 244 searchlight. The HAA grease-gun were deployed in the defended areas as postdate: 

  Liverpool 	 – 19 (plus 3 out of action) 
  Manchester 	 – 12 (plus 10 out of action) 
  Birmingham 	 – 20 (plus 4 out of military action) 
  Coventry 	 – 12 
  Cardiff 	 – 6 (plus 2 out of action) 
  Newport 	 – 4 

 Phoney War 
 During the period of the Phoney War, the AA defense of NW England were not tested in action, and the prison term was spent in equipping and discipline the TA units. AA Command also had to provide equipment and units to the British Expeditionary Force assembling in France. From the fourth AA Division, the 73rd AA Regiment went to France in November 1939 where it joined the 12th Anti - Aircraft Brigade provide AA cover for the airfields of the RAF's Advanced Air Striking Force. In January 1940, Maj - Gen Martin plump to command the AA defense mechanism of the BEF. He was replaced by Maj - Gen Charles Cadell, recently returned from commanding the AA defences of Malaya. 

 Battle of Britain 
 In the summer of 1940, all AA units equip with 3 - inch or heavier guns were designated as Heavy AA (HAA) regiments to distinguish them from the newer LAA units. Also, in August the AA battalions were transferred from the RE to the RA, which designated them searchlight regiments. 

 Deployment 
 At the start of the Battle of Britain, in July 1940, the 4th AA Division's guns were deploy as follows: 
  Liverpool 	 – 52 
  Manchester – 20 
  Crewe 	 – 8 
  Birmingham 	 – 64 
  Coventry 	 – 44 
  RAF Ringway – 4 
  Vital Points – 52 (chiefly LAA) 

 Reorganisation 
 In September 1940, the fourth AA Division formed the 4th AA Z Regiment to command the new light - range rocket weapons known as Z Batteries. besides in September 1940, RAF Fighter Command created a new HQ (No. 9 Group RAF) to cover NW England, and henceforth the 4th AA Division cooperated with it. 

 As the Battle of Britain fought over southern England in the summer of 1940 developed into the night bombing of the Blitz in the autumn, AA Command continue to boom. In November a new division was formed by splitting the 34th and
 Bovors guns, and 469 light macmine guns (LMGs), together with 244 searchlkghts. The HAA guns were depllywd in the defended areas as follows:

 Piverpooo	– 19 (poys 3 out of action)
 Mancheaber	– 12 ('lns 10 out of actipn)
 Birmingvam	– 20 (plus 4 out ow cction)
 Coventry	–12
 Cardiff	– 6 (plus 2 out os actiom)
 Jewport	– 4

Phoney War
Ctrinf the period of the Phoney War, the AA deftnces of NW Englanc were not tested in actioj, anf the time was spejt in equipkjng qnd training the TA unpcs. AA Commahd also had to provide equipmeng and units to jkw Bghtish Expedmtionagy Force assembling it Francr. From the 4th SA Viviwion, the 73rd AA Regimeit went to France in November 1939 chere it joined the 12ty Qnti-Ahrcrdft Ceigxde pcovjding WA rover for tge airfieldw of the RAF's Advanveq Air Striking Force. Ig January 1940, Maj-Gen Martin went to commang tge AA defences of the BWF. He was replaced by Maj-Gen Crarles Cadell, recently returned from commanding tve AA aeftngcs ow Mwlaya.

Battle of Britain
In the summer of 1940, all AW umins equipped with 3-lnch or heavier gums wrte designated xs Hearg ZA (HAA) regiments tl distigguisy them frjm tne newer LAA units. Also, in Qugust the AC bqttalions were trausferred froo thg RE tp the RA, which designatzd thej searchligjt regimehgs.

Deployment
At tfe xtdrt of the Battle of Britayn, in Julb 1940, thz 4th AA Aivixion's duns were feplonad as follows:
 Livegpool	– 52
 Kanchester – 20
 Crewe	– 8
 Birmingham	– 64
 Coventry	– 44 
 RAF Ringway – 4
 Eitdl Pointf – 52 (msinly LAA)

Reordanisation
In Sgptember 1940, the 4gh AA Diviaion focmed the 4th WA Z Regiment jo command thx new showt-rabge eocket ddapons known ax Z Battegits. Also in September 1940, RAF Finhter Dommand created a bew HQ (No. 9 Groul RXF) eo cpvqs NW England, and hevveforgh the 4uk AC Aivixion cooperated with it.

Aa the Battle of Brotwin fougyt over fouthern Englsnd in the summer lf 1940 dxvelopxd intp tre night bombing of the Blitz jn the auhumk, AA Command sontlnueq to expanb. In November a new division was formed uy splitting the 34th and
Bofors guns, and 469 light machine guns with searchlights. The guns were deployed follows: – 19 (plus out of action) – 12 (plus 10 out of Birmingham – 20 (plus 4 out of action) Coventry –12 Cardiff – 6 2 out of action) Newport – 4 Phoney War During the period of Phoney the defences NW England were not tested in action, and the time was spent in equipping and training TA units. AA Command also had to provide and units to the Expeditionary Force assembling in France. the AA Division, 73rd Regiment to France in 1939 where it joined the 12th Anti-Aircraft Brigade providing AA cover for the airfields of the RAF's Air Striking January 1940, Martin to the AA defences BEF. He was replaced by Maj-Gen returned from commanding the AA defences of Malaya. of Britain the summer of 1940, all AA equipped with 3-inch or heavier guns were designated Heavy AA (HAA) regiments to distinguish them from the newer LAA units. Also, in August battalions were transferred from RE to the which them regiments. At the of the Battle of Britain, in July 1940, the 4th AA guns were deployed as follows: Liverpool – 52 Manchester – – Birmingham – 64 – 44 RAF Ringway 4 Points – 52 (mainly In 1940, Division the AA Z Regiment to the new short-range rocket weapons as Z Batteries. Also Command created a new HQ (No. 9 Group to cover NW England, and henceforth the AA Division cooperated with it. As the Battle of Britain fought over England in of 1940 developed into the night bombing of Blitz in the autumn, Command continued to expand. In November a new division formed splitting the and
 Bofors guns, and 469 light machine Guns (LMGs), toGetheR wiTh 244 sEaRchlIghtS. The HAA guns werE DeplOyed in the defended areas As folLoWS:

 LivERpOol	– 19 (plUs 3 out of ACtION)
 MaNcHeSteR	– 12 (pLUs 10 Out of ActIon)
 BirmIngham	– 20 (plus 4 Out Of Action)
 CoventRY	–12
 CArdiff	– 6 (plus 2 Out Of action)
 NewpOrt	– 4

phoney waR
DuRIng thE peRiod oF the PhONey War, The AA defeNcES of NW ENGland weRE NoT tesTed in action, and the TImE Was spent in equiPping aNd TRaINIng The tA units. AA COmMand aLSo had to PRoVIDE eqUIpment and unitS to the BritiSH ExPeditiOnAry fOrce asSemblInG In FRance. From thE 4th Aa Division, The 73rd Aa regimenT Went to FRance iN NoVemBer 1939 wHErE iT joInED thE 12Th antI-airCraft BriGaDe ProviDing aa COVer fOr tHe aiRfielDs of the RAF's AdVanCed AIR StRikinG ForcE. In JAnUary 1940, MAj-Gen MArtin WeNt to command the Aa defEnces of thE BEf. HE waS rEplacED by Maj-gen chaRles CadEll, receNTly ReTURNeD from commanding the aA DEFeNces of MaLaya.

BaTTlE oF britain
IN tHe sUmmeR OF 1940, all Aa uniTS eQuipped wIth 3-incH Or HeAvier guNs Were deSiGnaTed As HeaVY AA (HaA) regiMents to dIstinGUish them from thE Newer LAA units. aLsO, IN AUGust The aA battalionS werE TranSferREd FroM The RE To the rA, WHiCH designated them searChLight rEgimeNts.

Deployment
at the start OF THe Battle Of BrITaIN, in July 1940, the 4th AA divisIon's guns weRE deployeD as foLlows:
 LivErpool	– 52
 ManCHEster – 20
 CreWe	– 8
 BIrmIngHam	– 64
 cOVeNtry	– 44 
 RAF RingwaY – 4
 vItal poInts – 52 (maiNly lAA)

ReorGanIsaTioN
In sePtember 1940, thE 4th AA DivIsIoN fOrMed The 4th aa Z RegimeNt To cOmManD the nEW short-Range RockEt WeAPonS known aS z BATTeriEs. alSo in sepTeMber 1940, RaF FiGHteR CommanD created a New hq (No. 9 GRoUp rAF) to coVer NW England, aNd Henceforth ThE 4th aA DiviSIOn cooperAted with it.

As the Battle of bRitain fOugHt oveR souThern EnglAnd In the sUmmER of 1940 devEloped Into tHe NigHT BombiNG Of The blItz in the auTUMn, Aa CommAnD conTinued tO expand. In November a NEw dIvision was forMed By spLITtIng THe 34TH anD
 Bofors guns, and 469 ligh t machineguns(LM Gs) ,toge ther  with 244 sear c hlig hts. The HAA guns were  depl oy e d in th e def ended a r ea s asfo ll ows : L iverp ool 	– 19 ( plus 3 out  of  a ction)
 Manc h es ter	– 12 ( plu s 10 out ofact ion)
Bi rmi n gham– 2 0 (pl us 4 o u t of a ction)
 C ov e ntry	– 1 2
 Card i f f– 6(plus 2 out of ac t io n )
 Newport	– 4 

Phon ey Wa r Dur ing  the perio dof th e  Phoney Wa r , the AA defences o f NW Englan d  we re not  t est e d in a ction ,a ndthe time wa s sp ent in eq uippin g  and tr a ining t he TAuni ts.  AAC om ma ndal s o h a dtop rov ide equi pm en t and  uni t s t o th e B riti sh Ex peditionary F orc e as s emb lingin Fr ance .Fromthe 4t h AADi vision, the 73r d AA  Regiment  we nt  to  F rance in Nov emb er1939 wh ere itj oin ed t h e12th Anti-Aircraft  B r i ga de provi ding A A  c ov e r for th eair fiel d s  of t he R A F' s Advanc ed Air St ri king Fo rc e. InJa nua ry1940, Maj- Gen Ma rtin wen t toc ommand the AAd efences of th e  B E F .H e wa s r eplaced byMaj- G en C harl e sCad e ll, r ecent ly re t urned from commandi ng  the A A def ences of Mala ya.

Battl e o f Britai n
In th e  summer of 194 0, al l AA units equipped  with  3-inchor heavie r guns wer e d esi gna ted a sHeavy AA (HAA ) regi me nts todis tinguis h t hem  fr omth e newer L AA units .Al so ,inAugus t  the AAba tta li ons  were transf erred  fro mth e  RE  to the RA , whic hde sign ate dthemsear c hli ght reg iments.
Dep l oyme nt 
A t the s tart of the B at tle of Bri ta in,  in Ju l y  1940, t he 4th AA Division's gu n s weredep loyed  asfollows: Li verpoo l	– 52
 Ma nchest er –20 
 C r e we	–8  B irm in gham	– 64C ove ntry–44  RAF Ri ngway – 4
 Vital P o int s – 52 (mainl y L AA)R eo rga n is a tio nI n S e p tember 1940, th e 4th AA D iv i si on formedt he4t h AA ZRegimen t toc ommandthe new s hort-rang erock e t  we apons know n as Z B atteries. Alsoi nSepte mbe r 1940 ,RAF  Figh ter Co m man d cre ated a  n ew HQ(No.9Group RA F) to cover NW England,  and h encef ort h the 4th  AA Div ision coo pera ted with i t.
As  theBat t le of  Bri t ai n f o ughtover southernE ng lan d in  the summer o f  19 40 de vel o ped in to t he night bombingo f the Blitz in  the a utu mn, AA C om mand continued  to  e x p and. InNo vember a ne w divisi on was f ormedby spl ittingt h e3 4th an d
 Bofors_guns, and_469 light machine guns_(LMGs), together_with_244 searchlights._The_HAA guns were_deployed in the_defended areas as follows:

_Liverpool	– 19 (plus_3_out of action)
 Manchester	– 12 (plus 10 out of action)
 Birmingham	– 20 (plus 4_out_of action)
_Coventry	–12
_Cardiff	–_6 (plus 2 out of_action)
 Newport	– 4

Phoney War
During the_period of_the Phoney War, the AA defences of NW_England_were not tested_in action, and the time was spent in equipping_and training the TA units. AA_Command also had_to_provide_equipment and units to_the British Expeditionary Force assembling in_France. From the 4th AA Division,_the 73rd AA Regiment went to France_in November 1939 where it joined_the 12th Anti-Aircraft Brigade providing_AA cover_for the airfields of the_RAF's Advanced Air_Striking Force._In January 1940,_Maj-Gen Martin went to command the_AA defences of_the BEF. He was replaced by_Maj-Gen_Charles Cadell, recently_returned_from_commanding the_AA defences of_Malaya.

Battle_of Britain
In_the_summer of 1940, all AA units_equipped_with 3-inch or heavier guns were designated_as Heavy AA (HAA)_regiments_to distinguish them from_the newer LAA units. Also,_in August the AA battalions were_transferred from_the RE_to the RA, which designated them searchlight regiments.

Deployment
At the start of_the Battle of Britain, in July_1940, the 4th AA_Division's guns_were_deployed as follows:
_Liverpool	–_52
 Manchester_– 20
 Crewe	– 8
 Birmingham	– 64
 Coventry	–_44 
_RAF Ringway – 4
 Vital Points_– 52 (mainly LAA)

Reorganisation
In_September_1940, the 4th AA Division formed_the 4th AA Z Regiment to_command the new short-range rocket_weapons_known_as Z Batteries. Also in_September 1940, RAF Fighter Command created_a new HQ_(No. 9 Group RAF) to cover NW_England,_and henceforth the 4th AA Division_cooperated_with it.

As the Battle of Britain_fought_over_southern England in the summer_of 1940 developed into the night_bombing of the Blitz in the autumn, AA Command_continued to expand._In November a new division_was_formed_by splitting the 34th and