Clarinet concerto is the 1st work, followed by the violoncello concerto. Compact disc (ADD). Durations: 29:19; 41:06. The 1st work was recorded in 1977; the 2nd work was recorded in 1979. In the 1st work: John Denman, clarinet ; New Philharmonia Orchestra ; Vernon Handley, conductor. In the 2nd work: Yo-Yo Ma, violoncello ; Royal Philharmonic Orchestra ; Vernon Handley, conductor.