The series began in 1964, with what was intended to be a one-off documentary about the disparate lives of British seven-years-olds from different economic backgrounds.
The hour-long, one-off documentary - which will air on both ITV1 and ITV2 - is being made by independent producer World's End Productions.
One-off documentary Costa del Sol: Last Brits Standing takes a look at an intriguing cross section of expats in the Spanish Costa del Sol.
Bim Adewunmi In this one-off documentary, Congo-born Londoner Kevani Kanda travels to Africa to shed light on the Congolese belief in witchcraft, or "kindoki".
A one-off documentary such as Blackfish, or a series like Netflix's Making a Murderer shows that documentaries can prompt change and provoke debate on a huge scale.
I can imagine Bunk Bed existing without a licence fee, as a series of podcasts, but what of the one-off documentary?
Love Productions is working on spin-off documentary series with a working title Immigration Street focusing on Derby Road, Southampton, which has also provoked opposition from local politicians.
She invested the money in what was to be a one-off documentary called Staying Alive, hosted by George Michael, about the lives of six young people living with or affected by HIV.
Young, Bright and on the Right, BBC2 The one-off documentary is in healthier shape this year, the Wonderland strand doing a lot of work to get the genre back to full fitness.
Hannah Verdier This one-off documentary is really a nostalgia piece, looking back to a time before 24-hour news channels, the internet and Twitter, when a breaking story would interrupt the TV schedule.
