London. Air-Borne Attack On: Memo. By J.I.C.

5. So long as our fighter squadrons continue to operate from their present positions in the vicinity of London, aircraft engaged in dropping parachute troops over London would be very vulnerable and heavy casualties are to be expected. The landing of parachute troops might, however, well be attempted, particularly at dawn, even in the absence of local air superiority. 6. No estimate can be given as to the number of troops, if any, which could be landed by gliders. CONCLUSIONS. 7. The number of parachute troops which could be landed simultaneously are not sufficient effectively to isolate London.