The Special Operations Executive developed many devices in rapidly built wooden workshops that helped conceal sensitive work. Limpet mines and the sticky bomb are offered as examples of unconventional weapons. SOE is left outside the ranking because adding another whole organization centered on workshops would give that category too much space in the list. The comparison with Bletchley Park and TRE also leaves a blurred boundary between experiments in personal sheds and work in an institution's own small buildings.
Notable Point · 2:08:25-2:09:32
SOE workshops produced an arsenal of improvised weapons
Limpet mines, sticky bombs, and other unconventional weapons show why an entire organization built around dispersed workshops was difficult to reduce to one ranking entry.