Aldbury Church, 7.30pm, £16. Tring Chamber Music’s second convert of the season, called Four by Four, includes: Haydn 'String Quartet Op 77 No 2 F major', Rawsthorne 'Theme and Variations for 2 violins', Wolf 'Italian Serenade' and Beethoven 'String Quartet Op 18 No 5 A major'.