Wishbone Ash is a British rock band known for their distinctive twin lead guitar style, which has influenced bands from Thin Lizzy to Iron Maiden. Formed in 1969 by Martin Turner and Steve Upton, the group's line-up has seen numerous changes, with founding member Andy Powell being the only constant. Their 1972 album "Argus" is often regarded as their most influential work, blending elements of progressive rock, hard rock, and folk. Wishbone Ash's innovative style and enduring music have cemented their place in rock history.