The Kreutzer Quartet's ‘Beethoven Begins’ series, based around the great German master's Op.18 string quartets, has included an example of new music in each of its six concerts, a tribute to the players’ eclectic tastes, versatility and accomplishment in diverse repertoire. Their generously filled programmes all take place within the flaky grandeur of Wilton's Music Hall, one of London's quirkiest and most bewitching venues.