Delia didn't write the theme as such, Ron Grainer did. He sketched out the score and said the kind of effects he wanted (swoosh!) and went on holiday. When he came back and heard what Delia has done he said "Did I write that"? to which Delia replied "Most of it". He wanted her to have co-credit but the BBC wouldn't have any of it.

Her 4 Inventions for Radio with Barry Bermange are stunning - or at least the three that I have are (Dreams, Amor Dei, The Afterlife)as was her occasional music for other things and the magnificent ELectric Storm album with David Vorhaus and Brian Hodgson (who created the sound of the Tardis by running a key up and down a piano string then reversing the tape). Bits of her work also appeared without credit in The Tomorrow People.

I have quite a lot of her stuff but am always looking for more. And who knows what is in her personal archive which is now held in a University. She certainly worked with Paul McCartney briefly in the late sixties and I think Pink Floyd too.