Test Card F
A girl, a clown, and a blackboard, for hours at a time.
The BBC's colour test card: Carole Hersee playing noughts and crosses with a toy clown called Bubbles, broadcast for decades.
It was on screen for thousands of hours because television did not broadcast all day. There was accompanying music, which is now a genre unto itself.
Carole Hersee is reckoned to have appeared on British television more than any other person, entirely by accident.
Cost back then
Free, and unavoidable
Goes for now
Test card prints and mugs are a small industry
