Formed in 1970 around ex-Deep Purple bassist Nick Simper, Warhorse were understandably close to early Deep Purple in their blend of keyboard-colored progressive rock and early heavy metal. The group coalesced when Simper left Deep Purple in 1969 to lead soul singer Marsha Hunt's backing band, which included Rick Wakeman on keyboards for a while. The backing band formed the nucleus of Warhorse, which recorded a couple of albums for Vertigo in the early 1970s. With their early hard rock/metal sounds and a singer (Ashley Holt) who could roll into over-serious, high stentorian vocal phrases, the group have also been compared to early Black Sabbath, although they lacked the hooks necessary to achieve the same level of success as Sabbath or Purple. Echoes of Yes (in the keyboards) and perhaps Uriah Heep can be heard as well. Warhorse broke up in 1973, with drummer Mac Poole joining Gong, and Holt and drummer Barney James (who briefly replaced Poole in Warhorse's final days) going to Rick Wakeman's band. ~ Richie Unterberger, All Music Guide