Here’s a double delight. First, an engaging new work which deserves a place in the chamber repertory; second, a passionate account of Brahms’s Clarinet Quintet which can hold its head high against starrier competition. ... Gumboots is by David Bruce (whose terrific new opera Nothing premiered at Glyndebourne recently). Its title derives from gumboot dancing – a type of secret communication developed by black miners in Apartheid South Africa, where the slapping of boots and chains in the flooded mines turned into a sort of dance. A long, tranquil opening movement gives way to five short, incredibly catchy dances. Doubling bass clarinet, Bliss is in his element, each dance strongly rhythmic, with a distinctive folk feel. The performers’ sense of fun is palpable.  Mark Pullinger