Were Paul Day and Mark Rankin both lead vocalists? 
Paul Day (musician): Paul Mario Day (born 19 April 1956, Whitechapel, East London) is a British singer who is well-known as the original lead vocalist of Iron Maiden from 1975 to 1976. Mark Rankin: Mark Rankin was lead vocalist with Scottish rock band Gun, who were best known for their cover of "Word Up!
yes