21st Signal Regiment (United Kingdom)

[10][4] From 1971 until 1992, the regiment was part of the 4 Signal Group supporting the British Army of the Rhine and was based at RAF Wildenrath.

[4][13] After the Options for Change restructuring in 1990, the regiment moved from Laarbuch to Azimghur Barracks, Colerne, where it remains presently.

Members of 214 Signal Squadron supported 3 Commando Brigade, and subsequently 20 Armoured Brigade, by delivering communications to the front line, as well as installing equipment that allowed tactical commanders to direct their troops, target insurgents, and support helicopter operations including casualty evacuation (CASEVAC).

[15] Elements of 21st Signal Regiment (Air Support) also deployed to Afghanistan in October 2013, and operated within Helmand, Kandahar and Kabul.

[22] In 2024, 21 Signal Regiment joined the newly formed Cyber and Electro Magnetic Activities (CEMA) Effects Group, within Field Army Troops.