TO BE KEPT UNDER LOCK AND KEY. It is requested that special care may be taken to ensure the secrecy of this document. (THIS DOCUMENT IS THE PROPERTY OF HIS BRITANNIC MAJESTY'S GOVERNMENT). S E C R E T. COPY NO. 43 J.I.C.(41)180. (Restricted Circulation) 27TH APRIL, 1941. WAR CABINET. JOINT INTELLIGENCE SUB-COMMITTEE. Circulated for the consideration of the Chiefs of Staff INVASION. Report by the Joint Intelligence Sub-Committee. 1. The Chiefs of Staff* have instructed us to examine and report on:(i) Whether there are any indications at the present time that invasion was becoming imminent.