Frankie Poullain, bass player for glam-rock band the Darkness, has left the group with the remaining members citing "musical differences".
Poullain [L] left the band with immediate effect
The band has enjoyed successes including Brit awards in 2004 and an Ivor Novello songwriters of the year prize in the same year.
The band's mainstream success began when their first single, Growing on Me, went into 2003's charts at number 11.
They also earned a gold disc in the US for 2004 album sales.
Last year's Kerrang! Awards saw them win two prizes for the second year running, including the best British band title.
And the band also contributed to the fundraising Band Aid 20 single last Christmas, which topped the charts for four weeks.