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

A.M. FORM No. 1479 TOP SECRET ULTRA TO BE KEPT UNDER LOCK AND KEY AND NEVER TO BE REMOVED FROM THE OFFICE. THIS FORM IS TO BE USED FOR AIR INTELLIGENCE MESSAGES ONLY. OFFICE SERIAL No. NR. No. GR. No. DATE TIME OF RECEIPT TIME OF DESPATCH SYSTEM FROM: SENDERS No. CX/MSS/T258/59 (T.O.O. 0430/27/7/44) XL 3717, XL 3758 TIME OF DESPATCH 4.30 am WEST EUROPE 27.7.44 EXTRACT FROM REPORT AT 0430/27/7:SIMULTANEOUSLY (IN THE FORENOON) THE ENEMY ATTACKED (++) 601 IN THE SECTOR OF 2 SS PANZER DIV AND BATTLE GRUPPE 91.