James Stewart Bain was a Scottish musician, best known for playing bass guitar in the bands Rainbow and Dio. He also worked with Thin Lizzy frontman Phil Lynott, co-writing on his solo albums.
Vivian Patrick Campbell is a Northern Irish singer-songwriter and musician. He came to prominence in the early 1980s as a member of Dio, and has been a member of Def Leppard since 1992. Campbell has also worked with Thin Lizzy, Whitesnake, Sweet Savage, Trinity, Riverdogs, and Shadow King.