In 1940 the Glasgow Company was absorbed into the newly raised 12th AA Divisional Signals, and in 1941 the remainder was converted into a mixed unit.
In 1942 AA Command was reorganised and the unit was amalgamated into 6th AA Group (Mixed) Signals, covering Scotland and North East England.
It was known as 13th AA (Mixed) Signal Regiment TA, part of 3rd Anti-Aircraft Group.
In 1957 it became 61st Signal Regiment TA and subsequently was allowed to add City of Edinburgh to its title in 1962.
In the reorganisation of the Reserve Army in 1967, it became part of 32 (Scottish) Signal Regiment (Volunteers), with responsibility for the provision of mobile communications throughout Scotland in an emergency.