In 2004, the group was reformed to provide territorial army and rear support to the Allied Rapid Reaction Corps in Germany.

Before the 1966 Defence White Paper and subsequent wide-ranging reorganisation of the Army, signal formations larger than those controlled by a Lieutenant Colonel (i.e.: battalion (regiment in the RCS)) were created.

Within the Royal Corps of Signals, eight new 'signal groups', commanded by a Colonel, were formed to oversee specialist units with specific duties, including those tasked with supporting the British Army of the Rhine (BAOR).

[1][2] A year after the 1966 Defence White Paper, on 1 April 1967, the 12th Signal Group (Volunteers) was formed with its headquarters initially at Erskine Barracks in Wilton.

[10] Following the Dissolution of the Soviet Union and subsequent End of the Cold War, the Options for Change defence review was announced.

[12][13] Shortly after formation, the group transferred to 1st (United Kingdom) Signal Brigade providing rear trunk communications.

[19][20] Following the reorganisation of the Army under the 1966 Defence White Paper, each regiment in the group consisted of a regimental headquarters, headquarter(s) squadron, three signal squadrons, and an attach light aid detachment (LAD) – company sized, commanded by a Major – provided by the Royal Electrical and Mechanical Engineers (REME).