Complex sentence: It is the first UB40 album not to feature vocalist/guitarist Ali Campbell and keyboardist Mickey Virtue due to both departing the band in 2008; consequently it is the first album by the band to feature vocalist Duncan Campbell.
Split into simpler sentences: It is the first album by the band not to feature the original lineup, as original vocalist/guitarist Ali Campbell and keyboardist Mickey Virtue departed in 2008. This is the first album by the band to feature vocalist Duncan Campbell.