2nd Anti-Aircraft Division (United Kingdom)


The 2nd Anti-Aircraft Division was an Air Defence formation of the British Army from 1935 to 1942. It controlled anti-aircraft gun and searchlight units of the Territorial Army defending the East Midlands and East Anglia during The Blitz.

Origin

In December 1935 the TA's 46th Division was disbanded and its headquarters was converted into 2nd Anti-Aircraft Division to control the increasing number of AA units being created. At first it administered all AA units in Great Britain outside London and the Home Counties, which were covered by 1st Anti-Aircraft Division. The new division was first organised at York, but shortly afterwards took over 46 Division's HQ at Normanton, Derby.

Order of battle

By the end of 1936 the division had the following order of battle, though many of the units were in an early stage of formation or conversion:
General Officer Commanding: Major-General James Harrison
The 40th, 41st, 42nd, 44th and 46th AA battalions had previously been TA infantry battalions in 46th Division.
In 1938 the Royal Artillery replaced the traditional unit designation 'Brigade' by 'Regiment', which allowed the AA Groups to take the more usual formation title of Brigades.

Mobilisation

The TA's AA units were mobilised on 23 September 1938 during the Munich Crisis. Because the organisation of the 2nd AA Division and its component units was not yet complete, it was only partially mobilised. The emergency mobilisation lasted nearly three weeks before the TA units were released on 14 October. The experience led to improvements in equipment scales, and a rapid expansion of AA defences brought many new AA gun and searchlight units into existence. In November 1938, the 32nd and 33rd AA Brigades transferred to the newly formed 4th Anti-Aircraft Division. In June 1939, the 30th and 31st AA Brigades joined the 7th Anti-Aircraft Division. They were replaced in the 2nd AA Division by new brigades created in September 1938: the 39th at Retford in Nottinghamshire and the 40th and 41st in London. The 39th AA Brigade was also intended to transfer to the 7th AA Division just before the outbreak of war, but in practice this did not occur. In April 1939, AA Command was formed to control all the AA gun and searchlight defences of the United Kingdom.
Major-General Harrison was transferred to command RA Training Establishments and was replaced as the General officer commanding of the 2nd AA Division on 30 May 1939 by Maj-Gen Claude Grove-White.
The deterioration in international relations during 1939 led to a partial mobilisation in June, and a proportion of TA AA units manned their war stations under a rotation system known as 'Couverture'. Full mobilisation of AA Command came in August 1939, ahead of the declaration of war on 3 September 1939.

World War II

Order of Battle 1939–40

On the outbreak of war the 2nd AA Division had the following order of battle:
In addition, the 39th AA Brigade remained with the 2nd AA Division with the following composition:
39th Anti-Aircraft Brigade at RAF Digby
When these units went to their war stations, the division had 97 heavy AA guns ready for action, distributed as follows:
The division also had 6 3-inch and 12 40mm Bofors light AA guns, as well as 88 light machine guns.
On 23 September 1939, responsibility for the Humber Gun Zone was transferred from the 39th AA Brigade to the 31st AA Brigade in the 7th AA Division. This responsibility reverted to the 39th AA Brigade and the 2nd AA Division in May 1940.

Battle of Britain

By 11 July 1940, at the start of the Battle of Britain, the division's strength had risen to 231 guns of all types :
In August 1940, all RE AA battalions became Searchlight regiments of the RA, and AA regiments became HAA regiments to distinguish them from the new LAA regiments being formed.
In July 1940, at the height of invasion fears, a mobile column called 'Macduff' was formed by the 50th AA Brigade, consisting of one HAA battery and one S/L Company to operate directly under the command of the 2nd AA Division, available to combat enemy paratroopers.

The Blitz

By late 1940, the 2nd AA Division formed part of II AA Corps. Grove-White had been promoted on 11 November to command the new corps and at first it shared the 2nd AA Division's HQ at RAF Hucknall. The 2nd AA Division then moved to Kimberley, Nottinghamshire, and then on 27 January 1941 to Milton Hall, near Peterborough. The brigades were the same, but by February 1941 their locations and composition had changed:
In the Spring of 1941, The 50th LAA Brigade was split up, keeping the S/L regiments while a new 66th AA Brigade took the HAA guns and rockets:
The division's order of battle thus contained a large number of S/L units. AA Command redeployed its S/L units during the summer of 1941 into 'Indicator Belts' of radar-controlled S/L clusters covering approaches to the RAF's Night-fighter sectors, repeated by similar belts covering AA Command's Gun Defence Areas. Inside each belt was a deep 'Killer Belt' of single S/Ls cooperating with night-fighters patrolling defined 'boxes'. The pattern was designed to ensure that raids penetrating deeply towards the Midlands GDAs would cross more than one belt, and the GDAs had more S/Ls at close spacing. The number of LAA units to protect Vital Points such as airfields was growing, albeit slowly.
After December 1941 the division's order of battle was as follows:
32nd AA Brigade
40th AA Brigade
41st AA Brigade
50th AA Brigade
66th AA Brigade
'Mixed' indicates that women of the Auxiliary Territorial Service were integrated into the unit.
The increased sophistication of Operations Rooms and communications was reflected in the growth in support units, which attained the following organisation by May 1942:
The RAOC companies became part of the new Royal Electrical and Mechanical Engineers during 1942.
The 66th AA Brigade HQ, with its signal section and transport company, left AA Command in August 1942 and came under War Office control ready to join First Army in the invasion of North Africa.

Disbandment

The 2nd AA Division, like the other AA Corps and Divisions, was disbanded and replaced on 1 October 1942 by a new AA Group structure. The Midlands and East Anglia were covered by the 5th AA Group, headquartered at Hucknall. The 2nd AA Divisional Signals was apparently converted into the new Group signal unit.

General Officer Commanding

The following officers commanded the 2nd AA Division: