The theme is actually by John Baker, another member of the Radiophonic Workshop.
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Happosai _,,,,_(O ; o)_,,,, Mon 6 Jul 2020, 20:12,
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Do you have a reference for that?
I've seen DD credited with writing the theme before, but it's not in her credits list on allmusic.com.
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tarka_dall Like normal dall, only a bit more spicy, Mon 6 Jul 2020, 20:41,
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The track is called Factors.
It appears on this compilation, first released in 1968 and re-released several times since.
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Happosai _,,,,_(O ; o)_,,,, Mon 6 Jul 2020, 21:48,
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