Petroc Trelawny introduces highlights from a series of BBC Proms chamber music concerts at Cadogan Hall in London. Norwegian trumpeter Tine Thing Helseth and her all-female ten-piece brass ensemble tenThing perform a virtuosic programme of tangos, habaneras and marches from Piazzolla, Bizet and Grieg, plus a selection from Kurt Weill's Threepenny Opera. Show less