OK, the film I was trying to remember the name of was a Hammer film made for TV and it was called 'In Possession'.
Scariest thing I ever saw. The suspense is incredible. You really don't know what's going on, and there is a great twist at the end. It could be described as similar in spooky feelings to 'The Sixth Sense', although was made in 1984 and is English'.
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Time is an illusion. Lunchtime doubly so.
Epona of The Laughing Hyenas
Proud winner of the 'Most Useless Post 250 Has Ever Seen' Award 2001. "I'd just like to thank my friends and family, without whom none of this would have been possible..."