I want to be a jockey when I grow up. Yeah, I want to be a jockey when I grow up."
In 1964, these words from seven-year-old Tony Walker, a perky little scamp from the East End, caught the imagination of TV viewers on Seven Up!, a special edition of World in Action. The four-second footage, in grainy monochrome, has become a symbol – not just of youthful aspiration, but of a changing Britain, too. For that programme – which evolved into the Up series and has followed Tony and the other children ever since – became TV's greatest social experiment.
The Telegraph London