When the Territorial Army (TA) was reformed in 1922 it included a number of dedicated AA units of the Royal Artillery (RA).

On 8 February 1923 the regiment was transferred to the Royal Garrison Artillery (RGA), which had provided the AA batteries in World War I.

Because the units possessed only a small scale of transport, elaborate plans had been made to requisition civilian vehicles, ranging from heavy lorries to buses and private cars.

[9] The TA was doubled in size after the MunichCrisis, and 313 AA Battery was formed at Brentford and joined the regiment in April 1939.

[1] 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'.

[23] The regiment remained with 9 AA Division until March 1942, when it joined the War Office Reserve[24][25] and then embarked for Ceylon, arriving at Colombo on 28 May and moving to Trincomalee a month later.

[13][15][26] 154 (London) Battery was stationed with East Africa Command in November 1942,[27] and 29 March 1943 joined 56 (Cornwall) HAA Regt in Ceylon.

It spent the whole of December travelling to Palel in Manipur on the Burmese border, where it came under XXXIII Corps in Fourteenth Army to join in the advance across the Chindwin River.

11th EA Division with its AA support then moved north up the Chindwin to Kalewa, an important ferry centre which was to be the crossing site for XXXIII Corps.

Japanese air attacks had been slight up to this point, but now their aircraft made a determined attempt to knock out the bridge.

Intense concentrations of fire by 52nd and the other AA units broke up the attacks, destroyed six aircraft, and ensured that the bridge remained intact.

The HAA guns were mainly used in the ground role, but when the advance reached Payagyi and Pegu, only 70 miles from Rangoon, the airfield complex and the bridge over the Sittang River required AA cover, for which 271 Bty was deployed against small and scattered air raids.

[34] When Rangoon fell in early May, 24th AA Bde took over responsibility for its air defence, and 52nd HAA Rgt deployed its 24 3.7-inch guns to defend the docks, airfield and oil installations.