The 77th Brigade (United Kingdom) - Wikipedia
https://en.wikipedia.org/wiki/77th_Brigade_(United_Kingdom)Laurie Clarke in Wired described the brigade as a "psychological operations unit responsible for 'non-lethal' warfare that reportedly uses social media to "control the narrative", as well as disseminating UK government-friendly podcasts and videos".
Warfare Today says of the brigade that it is a combined regular army and reserve unit "for non-lethal warfare and behavioural influence", based at Denison Barracks, Hermitage, Berkshire.
The SAG [Security Assistance Group] aimed to have a full strength of 453 military and civilian personnel and occasionally, personnel from the Foreign and Commonwealth Office, Department for International Development and the Stabilisation Unit may be attached to the Brigade or work with it, of this total there will be 440 military posts in the brigade.
