The BBC is marking the 60th aniversary of the Central Office of Information (there's a discussion to be had about the English and their fascination with the concept of 'the centre'... perhaps another day) by releasing a range of archived films.
This one "Lonely water" was released in 1973 to warn children about the dangers of playing near water. I'm surprised it hasn't been reprised as a horror movie!Provides an interesting insight into models of childhood in the 1970s.