While Britain was at war with Nazi Germany, a medium named Helen Duncan, who held seances was arrested and tried under the Witchcraft Act. British military intelligence were involved.
Her seances sound as if they were very old school' (i.e. lots of ectoplasm, phenomena etc)...but the weirdest thing was, the spirits who came to her, to speak to their loved ones at these seances, knew state secrets no-one else at the time knew, except those directly involved, or those in Intelligence.
First she was arrested as a spy. Then they changed the charge to "Witchcraft".
"The Blitz Witch" (Paranormal Documentary)
http://youtu.be/zM8kFhuwoSk
Extremely interesting.....there are lots of sceptics and 'debunkers' in this video, but the fact remains that Helen Duncan knew things that Intelligence didn't want her to know, and that is why she was imprisoned. And apparently, she knew these things from the spirits of service personnel who had passed over.
I can't help thinking that if she'd had any access to any of this information from more mundane sources, British Intelligence could have easily worked that out.
Poor woman....she didn't live long after she was released from jail.