Since winning the Symphony Orchestra of Sri Lanka Concerto Competition at the tender (and record-setting) age of 16, Tanya Ekanayaka has become one of Sri Lanka’s pre-eminent concert pianists. Last month she was the first from her country ever to appear in the long-running Pianists of the World series at St Martin-in-the-Fields, with a programme featuring Bach, Beethoven, Ravel and her own improvised composition, Adahas: of Wings of Roots.