 Composing the score for each episode until his death in 2007 , Hazlehurst spent an average of ten hours per episode watching scenes and making notes for music synchronisation . Hazlehurst then recorded the music using an orchestra consisting of a guitar , harmonica , two violins , a viola , cello , accordion , horn , bass , flute , and percussion . The distinctive harmonica was played by Harry Pitch , who had featured in the 1970 one @-@ hit @-@ wonder " Groovin With Mr <unk> " . 
