3 minute wonder research.

A 3 minute wonder is a short 3 minute documentary about whatever the director wishes. They can cover whatever they wish but they only have a 3 minute time limit.
A 3 minute wonder is used by the director to express their feelings on any given issue, for example one of the 3mw I've seen was about game shooting and another one I've seen was about immigration.
Almost anything imaginable is fair game in a 3mw, well apart from aliens, most 3mw are about real-world issues or something they feel especially strongly about.

 After extensive 3 minute wonder research I've found my favourites were;
Karl Pilkington: Life
Karl Pilkington: Health
Karl Pilkington: Holiday
Because they were funny. interesting and it was good to see someone else view on life and other things like that. I didn't actually learn that much, apart from the fact London has an abundance of Gyms and not many hardware stores. All three of these documentaries were made of a interactive documentary style.

TV listings:

Channel 4 Monday- Sunday

16/03/2015: 6 out of 33 programmes were documentaries

17/03/2015: 5 out of 33 programmes  were documentaries

18/03/2015: 6 out of 31  programmes were documentaries

19/03/2015: 9 out of 32  programmes were documentaries

20/03/2015: 2 out of 32  programmes were documentaries

21/03/2015: 3 out of 31  programmes were documentaries

22/03/2015: 2 out of 29  programmes were documentaries

BBC 1 Monday - Sunday

16/03/2015: 2 out of 24 programmes were documentaries

17/03/2015: 2 out of 25 programmes were documentaries

18/03/2015: 3 out of 25 programmes were documentaries

19/03/2015: 2 out of 32 programmes were documentaries

20/03/2015: 0 out of 32 programmes were documentaries

21/03/2015: 0 out of 31 programmes were documentaries

22/03/2015: 1 out of 29 programmes were documentaries

BARB figures for documentaries: 

As the data above shows the highest rated shows on Channel 4 are factual programmes​