Not his own, of course. His best loved piece, the Cello Concerto, evades nothing, embraces everything. Steven Isserlis has a long, profound association with the concerto; his performance last night was inward-looking, his pacing neither rushed nor lugubrious. His cello sounded rich and mournful, its low moan occasionally sliding towards a plaintive whine. Meanwhile, he tossed his greying curls, his face taking on the ecstatic anguish of a martyred saint.