James Bradford "Jimmy" Nail (born 16 March 1954) is an English singer-songwriter, actor, musician, film producer, film score composer and television writer.He has starred in numerous roles on television since 1983. He is most famous for his role as Leonard "Oz" Osborne in the hit television show Auf Wiedersehen, Pet, his title role in Spender, and his 1992 number one single "Ain't No Doubt".