Six months into the year, see who's called time on their music career

Funeral For A Friend today (22 May, 2012) announced the departure of their drummer Ryan Richards, who quits the band in order to spend more time with his family.
But Richards' retirement from music is just one in a long line of music splits and quits that have already taken place in 2012. We're not even halfway through the year, so we dread to think who else we'll have lost before the end of the year.
From bands who have said a sad farewell to a long-term member (such as Mystery Jets and Editors) to bands who have called time on their career (such as Viva Brother and Handsome Furs) to bands who have seen members step down from touring duties (such as Sigur Ros and Black Sabbath), check out the break-ups, departures and musical casualties of 2012...