Plot: Award-winning Icelandic pianist Víkingur Ólafsson makes his much-anticipated Proms debut, as soloist in both Bach’s Keyboard Concerto in F minor, whose energised outer movements frame a ravishing central Adagio, and Mozart’s pioneering Piano Concerto K491, a rare minor-key work whose stormy, richly orchestrated music climaxes in a relentless dance. The Philharmonia Orchestra and its dynamic Finnish Principal Conductor Designate Santtu-Matias Rouvali frame the concert with two symphonies: Prokofiev’s playful ‘Classical’ Symphony, with its clever juxtaposition of traditional forms and contemporary colours, and the more loaded irony of Shostakovich’s compact Symphony No