An email from the composer Alan Parker arrived yesterday. His comments in response to some questions from Greg:
I initially got involved through the director, Gordon Flemyng. I had various talks with him, and started working on an idea for the theme. My relationship with Gordon was such that he 90% left me to compose the score, and would hear it when I had finished.
The idea to use harmonica was mine. The player was Paul Jones (Manfred Mann).
I composed the score on guitar, the acoustic guitar was a Martin, and the electric was a Telecaster.
I was very happy with the score. Apart from the harmonica I played all of the instruments. The score was recorded at my home studio.