Curious Questions: Which person has spent the most time on TV?
Is it Elvis? Is it Queen Elizabeth II? Is it Gary Lineker? No, it's an eight-year-old girl called Carole and a terrifying clown. Here is the history of the BBC's Test Card F.

It’s a long way from the corner of a 1970s British living room to a mobile music-app playlist in 2024. Yet there is one image that has, with peculiar stubbornness, crossed that analogue-to-digital rubicon.
If you were home from school with chicken-pox in the era before This Morning and Countdown, then, should you have switched on your parents’ wood-encased, steamer-trunk-weight television before hiding under an eiderdown on the sofa, the image presented to you would be that of a girl playing a game of noughts and crosses on a blackboard with a predictably sinister-looking clown.
That clown was called Bubbles and that girl was eight-year-old Carole Hersee. She would go on to become the person who, to date, has clocked up the most screen time of any individual in UK history (about 70,000 hours so far) as the face of the BBC Test Card.
Fast forward half a century and, if you search for ‘retro playlists’ on a music app on your phone, it won’t be long before you see Ms Hersee again; this time as the face of innumerable mixes featuring big band, bossa nova, light orchestral and other types of muzak.
To listen to ‘test card music’ or to see the girl — whose father, George Hersee, created the card when working for the BBC in 1967 — is an experience that would bewilder anyone born after 1990.
For those of an older vintage, the retro appeal of the test card has a committed fanbase, taking a generation of Britons back to when playing four hours of songs with titles such as Flying Over San Jose and Canzona D’amore was considered a legitimate way of spending licence-fee money and a soothing accompaniment to school sick days.
Yet, the test card served a more pragmatic purpose. ‘Officially described as Trade Test Transmissions, test cards were radiated specifically to enable engineers to work on television sets, in their workshops and in viewers’ homes and to supply a signal for the retail trade, so prospective buyers of new sets would be able to see a picture in the shops, albeit a still one,’ explains Stuart Montgomery, chairman of the Test Card Circle, a society for fans of the test card that has about 200 members, a quarterly magazine and an annual convention held in Worcester.
Sign up for the Country Life Newsletter
Exquisite houses, the beauty of Nature, and how to get the most from your life, straight to your inbox.
‘There was no real necessity to have music accompanying the test cards, but there was a requirement to have a sound signal,’ Mr Montgomery continues. ‘One of the attractions for enthusiasts was due to the simple fact that we weren’t told what the music was and that it wasn’t available to purchase. It therefore became like a secret drawer.’
Sightings of the ‘Test Card F’ featuring Ms Hersee are something of a white rhino today, as 24-hour coverage and the lack of need for engineers to ‘tune’ televisions for light, sound and tone have rendered the card all but redundant. Yet Ms Hersee (now 65 and a costume designer) has crossed to the digital world, as the face of playlists and on the BBC itself.
Between 2017 and 2020, should you have encountered a glitch on the BBC website (the technical term is an HTML error), when you were accidentally taken to a page that no longer existed, you would have seen Bubbles, repurposed with the accompanying slogan of ‘error 404- this page can’t be found.’ The girl, however, was nowhere to be seen.
‘I became fed up hearing about it. It should have gone years ago,’ Ms Hersee said in a BBC interview in 2001. With her face now all but extinct from flat screens and Bubbles replaced by the equally retro-accented Clangers on the Beeb’s error page, Ms Hersee’s wish, for now at least, appears to have come true.
Rob Crossan is a journalist and broadcaster
Curious Questions: Why do we still love pirate stories, 300 years on from Blackbeard?
Tales of swashbuckling pirates have entertained audiences for years, inspired by real-life British men and women, says Jack Watkins.
Rob is a writer, broadcaster and playwright who lives in Brixton, South London. He regularly contributes to publications including the Daily Mail, Daily Telegraph and Conde Nast Traveller. Rob is the Special Correspondent for the BBC Radio Four programme Feedback and can also be heard on the From Our Own Correspondent programme on BBC Radio Four and the World Service. His first play, 'The Gaffer', premiered at the Underbelly Theatre as part of the Edinburgh Fringe in 2023.
-
The real name of a 'ghost' rainbow, the first ever omnishambles, and golf on the moon: Country Life Quiz of the Day 20 February 2025
Some real brainteasers for you in our Quiz of the Day. Good luck!
By Toby Keel Published
-
Tom Parker Bowles's favourite recipe: French onion soup
This dish is no mere Gallic broth, rather pure bonhomie in a bowl — a boozy, beefy, allium-scented masterpiece that cries out for the chill depths of winter
By Tom Parker Bowles Published
-
Curious questions: How a horse on a treadmill almost defeated a steam locomotive
The wonderful tale of Thomas Brandreth's Cycloped and the first steam-powered railway.
By Martin Fone Published
-
You've got peemail: Why dogs sniff each other's urine
Ever wondered why your dog is so fond of sniffing another’s pee? 'The urine is the carrier service, the equivalent of Outlook or Gmail,' explains Laura Parker.
By Laura Parker Published
-
The ship that was in two different centuries, two different years, two different months, two different days and two different seasons, all at the same time
On December 31, 1899, the SS Warrimoo may have travelled through time — but did it really happen?
By Martin Fone Published
-
Curious Questions: Was music's famous 'Lady of the Nightingales' nothing more than a hoaxer?
Beatrice Harrison, aka ‘The Lady of the Nightingales’, charmed King and country with her garden duets alongside the nightingales singing in a Surrey garden. One hundred years later, Julian Lloyd Webber examines whether her performances were fact or fiction.
By Julian Lloyd Webber Published
-
Curious Questions: Who wrote the Happy Birthday song?
There are few things less pleasurable than a tuneless public rendition of Happy Birthday To You, says Rob Crossan, a century after the little ditty came into being
By Rob Crossan Published
-
Why do we get so many April showers?
It's the time of year when a torrential downpour can come and go in minutes — or drench one side of the street while leaving the other side dry. It's all to the good for growing, says Lia Leendertz as she takes a look at the weather of April.
By Lia Leendertz Published
-
Who was the original Jack Russell who gave his name to one of Britain's favourite dog breeds?
Kate Green takes a look at the the legacy of Revd John Russell, the man who gave his name to the Jack Russell and Parson Russell terriers.
By Kate Green Published
-
Why does BBC Radio 4 broadcast 'the pips' at the top of the hour?
The Greenwich Time Signal has been an ubiquitous part of BBC Radio for a century, but few know what it really is and where it came from
By Rob Crossan Published