The Divertimento in E flat for string trio is one of Mozart’s late, great masterpieces, a massive work in six movements on a symphonic scale. Curiously, there is no record of why or how Mozart wrote it. But we can only be glad that such a fine, intense performance as this brings out its mastery.

The longest and deepest of its six movements is the second-movement Adagio, introduced after the powerfully symphonic opening Allegro, with a most adventurous central development section. In this performance the hushed intensity of the playing of the Adagio, beautifully sustained at its measured pace, bears witness to the mastery of the three players. The third-movement Minuet and Trio is then a scherzo in all but name, leading to the theme-and-variations Andante, full of striking invention in the interplay of parts, ending traditionally in a minor-key variation and a final fast one, nicely pointed here. The second Minuet is then like a relaxed Ländler, leading into a finale in a swinging 6/8 rhythm.

As a fill-up for that 45-minute work, the Florin Trio play a piece specially written for them by Howard Skempton. Winter Sunrise was inspired by a pastoral poem by the generally neglected poet Mary Webb, much admired in the 1930s by the then prime minister, Stanley Baldwin. Skempton, who left behind his early avant-garde style many years ago along with the Scratch Orchestra, here writes in slow alternating chords, at first hushed, building up to a climax illustrating the sunrise. It may not be a work to match the Mozart but it is a welcome makeweight, again beautifully played.