Adrian Smith formed the band shortly in 1989 when Iron Maiden was taking a year break after spending almost a year on the road for the Seventh Son of a Seventh Son album tour in 1988. The band had its origin in Urchin, a band Smith fronted in the 1970s. Andy Barnett , Dave Colwell and Richard Young played with Smith in various incarnations of Urchin, which was disbanded in 1981 when Smith joined Iron Maiden. Further foundations for the band were laid out in late 1985 when Iron Maiden were taking a break after their massive world tour in support of their album Powerslave. Bored with the lull in band's activity as they prepared to record a new album, Adrian Smith invited his friends Colwell and Barnett, as well as other musicians they knew to play a one-off gig at London's Marquee Club under the name of "The Entire Population of Hackney". The band performed what would later be the title track from Silver and Gold, as well as 3 of the 4 B-sides to its singles at the show.Adrian Smith left Iron Maiden in 1990 during the writing of their album No Prayer for the Dying, due largely to creative differences.