UFO are an English rock band that was formed in London in 1968. They became a transitional group between early hard rock and heavy metal and the new wave of British heavy metal. The band's current lineup includes vocalist Phil Mogg, lead guitarist Vinnie Moore, rhythm guitarist and keyboardist Neil Carter, bass guitarist Rob De Luca, and drummer Andy Parker. They have gone through several line-up changes, leaving Mogg as the only constant member, and had two hiatuses (1983–1984 and again from 1989 to 1991). The band are also notable for featuring former Scorpions guitarist and MSG founder Michael Schenker, who was a member of UFO from 1973 to 1978 and again, occasionally, between 1993 and 2003, when Moore replaced him. In May 2018, Mogg announced that he would retire from UFO after one last tour as a member of the band in 2019.