Zum are Adam Summerhayes (violin), Chris Grist (cello), Eddie Hession (accordion), Dave Gordon (piano) and Jonny Gee (double bass). Since 2001 they have been performing a stunning fusion of the fire and brilliance of Eastern European gypsy fiddle music and the hot-blooded passion of Argentinean Tango, playing major music festivals throughout the UK and Europe as well as being five times sell-outs at the South Bank in London.