As I was doing the recycling the other day, my mind turned briefly to the different ways in which composers sometimes recycle, revise or reuse music. Taking the pieces in this programme by Alexander Shelley and the Royal Philharmonic Orchestra as examples. Sibelius' Violin Concerto in D minor was written in 1904 but was revised heavily in 1905, the third movement of Prokofiev's Symphony no. 1 in D major "Classical" was also used in his ballet Romeo and Juliet, and his Symphony no. 3 in C minor used music from an unperformed opera.