Delia first worked with Ron Grainer in 1962 to realise his score for the Doctor Who theme and in 1965/6 with Unit Delta Plus created 20 tracks of music and sound effects for his first play On The Level.
He was "the quiet Australian" and he had beautiful ears, I mean brilliant ears, the way his ear-brain function worked. Very good. Very good. He was very creative. He loved new sounds. He loved all sorts of new sounds. 
Ron was so thrilled with the sound of the Doctor Who first mix that he said “Give Delia half the royalties! I'm so pleased with it because I was going to book a band.” He didn't think that what he'd written on his score could be so well done with the equipment we had and he was a very generous person. But, of course, that wasn't allowed as I was only a Studio Manager. 
Ron Grainer visited the Workshop twice: once with the first piece of paper, secondly when he came back after a fortnight or so and Delia and I played him the end result. Ron never worked at the Workshop.