Just want to say thanks for the great review of what seems to be a real chiller, Andrew: I wish it was available locally so that I could see it.
It is interesting that you say this film scared you as a child ~ I think, by your description, this film would frighten me now, at the ripe old age of 39.
I would be interested to hear your thoughts (and read a review) of the films that scared me as a child, namely Baffled
, Crowhaven Farm
and Don't Be Afraid Of The Dark