S.O.S. Delia Derbyshire

Delia Ann Derbyshire (5 May 1937 - 3 July 2001) was an English musician and composer of electronic music and musique concrète. She is best known for her electronic realisation of Ron Grainer's theme music to the British science fiction television series Doctor Who and for her work with the BBC Radiophonic Workshop.

Some of her work reminds me slightly of the Ambient work of Brian Eno. Click the link to listen.
http://www.ubu.com/sound/derbyshire.html

Whereas most of her work sounds very haunting and unsettling but in a very different way from Hildegard Westerkamp, Instead Delia uses a lot of deep & heavy electronic riffs which is incredibly eerie. 

'Nightwalker' - Delia Derbyshire

'Depression' - Delia Derbyshire

'Psychadelian Waltz' - Deliah Derbyshire

'Blue Veils & Golden Sand' - Deliah Derbyshire