Question: What United Kingdom government is based in "The Doughnut" in the suburbs of Cheltenham and works alongside MI5 as part of the United Kingdom's intelligence machinery?
Sentence (from "Government Communications Headquarters"): The Government Communications Headquarters (GCHQ) is an intelligence and security organisation responsible for providing signals intelligence (SIGINT) and information assurance to the government and armed forces of the United Kingdom.
Relevant evidence: No