Delia made habitual use of several psychoactive drugs.
She always said that a very important part of her music was wine bottles in different stages of emptiness, pitching them up and pitching them down to use them as part of the sound. I don't know whether that was true but they were always there.
I remember at one point Ron Grainer saying to Delia "You drink too much." and she said "No, I don't." It was self-medication to keep herself calm, I think.
Interviewer: She was, though, apparently, Dick, addicted to snuff.
Dick Mills: Yes. She took tobacco in its alternative form. [...] The working hours were self-imposed long because you can't turn creativity on and off from nine 'til five and if it's going well you tended to stay there until it was finished.