I had a bit of a task finding out the name of the theme tune. I thought it was a British piece, but boy, was I wrong. I hummed the theme at work one day and someone told me it was Mozart's Horn Concerto No4. So I tried the search engines, but failed dismally. Anyway, my friend at work e-mailed me the MIDI file and depending on your browser you should be hearing it now. To hear the tune, click here. My thanks goes to Hiran for the name of the tune and for the file itself.