Last in Line, a Dio tribute project featuring former Dio and current Def Leppard guitarist Vivian Campbell that's named after the band's 1984-released album, is set to tour the U.K. next month, with the bulk of the material focusing on Ronnie James Dio's band's first two albums: 'Holy Diver' and 'Last in Line.' However, don't expect much from 'Sacred Heart,' the band's third album.