I don't think the theory that Leslie Howard was a Secret Agent is entirely new, but it has been floated again. Actor Leslie Howard kept Spain out of WWII, claims author - Telegraph
I read a brief mention of his loss relatively recently. Does the theory float? Shot down by Ju 88s in long-range fighter mode? Ah, of course, after a little research on my part. Oh no, am becoming fascinated with Biscay air ops, can't fight it... Interesting snippet from Wiki: His luck held! Have posted his fascinating bio in the bio forum here: http://ww2chat.com/forums/biographies/3511-s-l-wallace-ivor-lashbrook-mbe-dfc-afc-dfm.html#post21038