Falklands/JIC: GCHQ London signal to GCHQ Cheltenham (1700Z) ("Highlights of special JIC on Tuesday 6 April 1982" - JIC(82)16th Meeting) [decision to invade could not have been taken before 28/29 Mar; JIC agreed PM's request that Nicoll examine JIC performance in run-up to war, but Tovey warned against "repeated investigations" into intelligence arrangements as "insulting and ... highly damaging to morale"] [declassified May 2023]