never heard of this,made too soon? too cheap?

I was a teenager in Britain in the 1970s.
The Nielson case was a huge story in 1970s Britain.
But I have never heard of this film until very recently.
Britain made few films in the later 1970s,soft porn,tv show offshoots were made but few proper films.

I am surprised that this film was made so soon after the events and that it was made at all.


But on the other hand the story is an interesting one,often covered in factual tv shows,this film is on dvd now so if anybody has seen it can they tell me if it is worth seeing on any leave?