Flicks - A Dark, Dark Tale 

I found this on one of my tapes amongst the numerous Rainbow episodes I have. Presented by Christopher Lillicrap, Flicks was produced between 1984 and 1987 and each episode featured a story and song. The theme song to the show was performed by Rod Burton of Rainbow fame and of course one third of the singing trio, Rod, Jane and Freddy.
In this episode aired on 8th October 1987, Christopher talks about how everyday objects can look spooky in the dark, until you turn on the light and see there's nothing to be scared of. Chris tells a story called 'A Dark, Dark Tale'. Then he sings a song about a funny little character called the Bogus Boo, who likes to come out at night and scare people by shouting "Boo" very loudly. But Chris teaches the Bogus Boo a lesson by scaring him!