The state could not prove who told her the secret and therefore could not secure a conviction within the normal statute, so they dusted off an older one which could be used to punish her.
The outdated law is now abolished and cannot threaten con artists anymore, she got what she deserved and there is no need to exonerate her since she did something pretty evil and disgusting.
‘Mrs Duncan died in 1956, soon after being arrested again in a police raid on a seance.’
Kinda like the War on Drugs. Raid on a Seance. Thats crazy.
You seem to forget the German Navy knew they sunk the Barham. If the British were motivated to keep it a secret for morale reasons, the Germans were motivated to brag for the same reason.
Churchill was right, it was utter tomfoolery. What can one do if Churchill couldn't. In Britain, the reasoned mind is up against a society that pays royal louts a fortune, champions homosexuals, lets in the Muslims and asks it citizens to learn dhimmitude, can't fix their teeth, ... I give up.