Rachmaninov's Second Piano Concerto

Tom Service examines one of the most famous concertos in the piano repertoire. What is the secret of its appeal? Why does it have such emotional impact? Why did the critics hate it, yet why is it such a classical favourite in the world of popular culture - from Mickey Mouse to Marilyn Monroe to Muse? And what did Rachmaninov have to go through to compose it? With pianist Lucy Parham.