Wigmore Hall’s ‘Tippett: A Retrospective’draws to a close in fine style. StevenOsborne explores the composer’sone-movement Second Piano Sonata,partly influenced by the fantasy pieces ofWilliam Byrd and his contemporaries, andthe flamboyant Third Piano Sonata of 1973,complete with loud echoes of Beethovenat his most driven. The Heath Quartetreminds listeners of the extraordinary lateflowering of Tippett’s creativity with hisString Quartet No. 5, completed not longafter his 86th birthday. The piece reflectsTippett’s lifelong love for the music ofBeethoven, not least in its formal similaritiesto the Hymn of Thanksgiving movementfrom Beethoven’s String Quartet in A minorOp. 132.