TV test card & "The Scarfolk Nurse"
Here's a BBC Scarfolk TV testcard from 1970.
The SHS (Scarfolk Health Service) suggested these particular photographs in an attempt to subliminally accustom citizens to the plummeting success rate of state healthcare and to lower their expectations.
But they got more than they bargained for. Throughout the 70s a very faint, ghostly image of a woman's face began inexplicably appearing on Scarfolk's local TV broadcasts. Because she was first seen on this early 'SHS' testcard, she became known as "The Scarfolk Nurse."
She appeared on all kinds of programmes, but was most often seen during children's television broadcasts at times of social unrest. Engineers at the TV station never found a technical explanation for the phenomenon, nor could they for the examples of distant, eerie voices on the radio, which were also attributed to the "Nurse".
Can you see her? She's there if you look hard enough....