I watched it this evening, really enjoyed it, recommended.
Was originally shown as a "Play For Today"
It's a shame that the BBC wiped the colour master tape back in the 70's and it only now survives in black and white, doesn't ruin the viewing enjoyment though.
Norah Palmer (Anna Cropper) is a television script editor who temporarily moves to a remote English country village to rebuild her life after a bad break-up. At first, she finds that the villagers are friendly, if a little eccentric. When she becomes pregnant to the handsome gamekeeper Rob, she begins to suspect the locals of conspiring against her, preventing her from leaving the village for her home in London. Directed by the renowned producer/director James MacTaggart from a script by John Bowen (A Ghost Story for Christmas: The Ice House, Dead of Night: A Woman Sobbing) and made during the golden age of British TV chillers, this provocative and disturbing drama, with its combination of unsettling folk rituals and insular regional communities, is considered to be an influence and precursor to The Wicker Man, and has built up a cult following over the years since its original broadcast in the Play for Today strand.