In May 1945, after the German surrender at Lüneburg Heath, 344 Bty was used to provide illumination over Hamburg, particularly the Prisoner of War (PoW) cages and the bridging operations on the Elbe.
In 1947, 58th S/L Regiment reformed in the TA as an AA artillery unit, with members of the Women's Royal Army Corps integrated into its ranks, as 593rd (Mixed) Heavy Anti-Aircraft Regiment, RA (Harrow).