Communications Electronics Security Group
A security services body, also called CESG
CESG (part of GCHQ) is not subject to FOIA and therefore will not process FOIA requests.
Under Regulation 4 of the Environmental Information Regulations (EIR), environmental information relevant to the functions of the Security Service, which does not adversely affect national security can be requested.
You can only request information about the environment from this authority.
Only requests made using WhatDoTheyKnow are shown. ?