The Cyber and Electro Magnetic Activities Effects Group (CEMA Effects Group) is a combat support formation of the British Army formed in 2024.

The group brings together three specialist regiments of the Royal Corps of Signals under Commander Field Army.

As part of the Army 2020 and subsequently Army 2020 Refine programmes, the 14th Signal Regiment (Electronic Warfare) under control of the 1st Intelligence, Surveillance and Reconnaissance Brigade (6th (UK) Division), while the 13th Signal Regiment was formed in June 2020 under 1st (UK) Signal Brigade (6th (UK) Division) as the first dedicated cyber unit.

[2][3] The group will, alongside 16th Air Assault Brigade Combat Team, the Intelligence, Surveillance, and Reconnaissance Group, 2nd Medical Group, and the Land Warfare Centre be part of Field Army Troops, a sub-command of the Field Army which is under direct control of Field Army HQ.

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