Government Code and Cypher School: Signals Intelligence Passed to the Prime Minister, Messages and Correspondence

A file of signals intelligence reports, messages, and correspondence issued by the Government Code and Cypher School and sent by the head ('C') of the Secret Intelligence Service (MI6) to the Prime Minister, Winston Churchill. This file contains a minute from C to the Prime Minister (PM) covering 6 BJ Sigint reports, numbers ZIP/JMA/3726, 125762, 126510, 127093, 127094, 127191 (all not included); also Report 15, on Berlin air raids from November 22-December 3; and a report on CROSSBOW V-1 installations (see 5378).