The music of Canterbury duo Ultramarine resists easy classification, drawing as it does from ambient, techno, folk, and eclectic '70s Canterbury art rock artists like the Soft Machine, Caravan, and Robert Wyatt, who occasionally performed live with the group and appeared on their United Kingdoms album. The group, which is made up of Paul Hammond and Ian Cooper, has a distinctively British sound and employs a wide range of instruments and sounds.