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 includes the following reports on North Africa: a situation report from the 90th Light Division for July 12; of preparations for an attack on El Alamein, on July 12; of intelligence gathered from prisoners; of British efforts against supply routes; that thirty six transport aircraft have crossed from Crete to Tobruk; and that twenty aircraft are to land at Bir El Abd.